Unhandled error type base64.match is not a function

[dannykorpan]

What happened?

Hi community,

I’m occasionally receiving the following error message when using Claude 3.7 via Amazon Bedrock.

Does anyone have an idea what’s causing this issue and how to fix it?

Thank you and best regards,
Danny

Version Information

root@prod-gpt:/opt/docker/LibreChat# docker images | grep librechat
ghcr.io/danny-avila/librechat-dev                latest    7440a8b751db   19 hours ago    950MB
ghcr.io/danny-avila/librechat-rag-api-dev-lite   latest    817faebddae9   3 weeks ago     1.31GB

Steps to Reproduce

1. Create a new chat with Amazon Bedrock
2. Wait some time
3. Continue an existing chat over Amazon Bedrock

What browsers are you seeing the problem on?

Chrome

Relevant log output

error.log
`
{"level":"error"}
{"level":"error","message":"[api/server/controllers/agents/client.js #sendCompletion] Operation aborted base64.match is not a function","pregelTaskId":"342a5bff-f31a-520f-8176-36f9b7bfe883","stack":"TypeError: base64.match is not a function\n    at extractImageInfo (/app/node_modules/@langchain/aws/dist/common.cjs:139:32)\n    at convertLangChainContentBlockToConverseContentBlock (/app/node_modules/@langchain/aws/dist/common.cjs:176:16)\n    at /app/node_modules/@langchain/aws/dist/common.cjs:257:34\n    at Array.map (<anonymous>)\n    at convertHumanMessageToConverseMessage (/app/node_modules/@langchain/aws/dist/common.cjs:257:23)\n    at /app/node_modules/@langchain/aws/dist/common.cjs:327:20\n    at Array.map (<anonymous>)\n    at convertToConverseMessages (/app/node_modules/@langchain/aws/dist/common.cjs:322:10)\n    at ChatBedrockConverse._streamResponseChunks (/app/node_modules/@langchain/aws/dist/chat_models.cjs:686:96)\n    at _streamResponseChunks.next (<anonymous>)"}
{"level":"error","message":"[api/server/controllers/agents/client.js #sendCompletion] Unhandled error type base64.match is not a function","pregelTaskId":"342a5bff-f31a-520f-8176-36f9b7bfe883","stack":"TypeError: base64.match is not a function\n    at extractImageInfo (/app/node_modules/@langchain/aws/dist/common.cjs:139:32)\n    at convertLangChainContentBlockToConverseContentBlock (/app/node_modules/@langchain/aws/dist/common.cjs:176:16)\n    at /app/node_modules/@langchain/aws/dist/common.cjs:257:34\n    at Array.map (<anonymous>)\n    at convertHumanMessageToConverseMessage (/app/node_modules/@langchain/aws/dist/common.cjs:257:23)\n    at /app/node_modules/@langchain/aws/dist/common.cjs:327:20\n    at Array.map (<anonymous>)\n    at convertToConverseMessages (/app/node_modules/@langchain/aws/dist/common.cjs:322:10)\n    at ChatBedrockConverse._streamResponseChunks (/app/node_modules/@langchain/aws/dist/chat_models.cjs:686:96)\n    at _streamResponseChunks.next (<anonymous>)"}
{"level":"error","message":"[logoutUser] Failed to destroy session. Cannot read properties of undefined (reading 'destroy')","stack":"TypeError: Cannot read properties of undefined (reading 'destroy')\n    at logoutUser (/app/api/server/services/AuthService.js:57:19)\n    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)\n    at async logoutController (/app/api/server/controllers/auth/LogoutController.js:10:20)"}
{"level":"error","message":"[api/server/controllers/agents/client.js #sendCompletion] Operation aborted base64.match is not a function","pregelTaskId":"d74369db-032d-5df1-981c-c3d8dceefa6d","stack":"TypeError: base64.match is not a function\n    at extractImageInfo (/app/node_modules/@langchain/aws/dist/common.cjs:139:32)\n    at convertLangChainContentBlockToConverseContentBlock (/app/node_modules/@langchain/aws/dist/common.cjs:176:16)\n    at /app/node_modules/@langchain/aws/dist/common.cjs:257:34\n    at Array.map (<anonymous>)\n    at convertHumanMessageToConverseMessage (/app/node_modules/@langchain/aws/dist/common.cjs:257:23)\n    at /app/node_modules/@langchain/aws/dist/common.cjs:327:20\n    at Array.map (<anonymous>)\n    at convertToConverseMessages (/app/node_modules/@langchain/aws/dist/common.cjs:322:10)\n    at ChatBedrockConverse._streamResponseChunks (/app/node_modules/@langchain/aws/dist/chat_models.cjs:686:96)\n    at _streamResponseChunks.next (<anonymous>)"}
{"level":"error","message":"[api/server/controllers/agents/client.js #sendCompletion] Unhandled error type base64.match is not a function","pregelTaskId":"d74369db-032d-5df1-981c-c3d8dceefa6d","stack":"TypeError: base64.match is not a function\n    at extractImageInfo (/app/node_modules/@langchain/aws/dist/common.cjs:139:32)\n    at convertLangChainContentBlockToConverseContentBlock (/app/node_modules/@langchain/aws/dist/common.cjs:176:16)\n    at /app/node_modules/@langchain/aws/dist/common.cjs:257:34\n    at Array.map (<anonymous>)\n    at convertHumanMessageToConverseMessage (/app/node_modules/@langchain/aws/dist/common.cjs:257:23)\n    at /app/node_modules/@langchain/aws/dist/common.cjs:327:20\n    at Array.map (<anonymous>)\n    at convertToConverseMessages (/app/node_modules/@langchain/aws/dist/common.cjs:322:10)\n    at ChatBedrockConverse._streamResponseChunks (/app/node_modules/@langchain/aws/dist/chat_models.cjs:686:96)\n    at _streamResponseChunks.next (<anonymous>)"}


debug.log
`
2025-05-06T08:01:44.393Z debug: [BaseClient] userMessage
{
  messageId: "ad4054d6-317b-4985-94cc-d42dd3cc3a13",
  parentMessageId: "27ecbfe8-00b3-47b5-9d70-0b5583ff0422",
  conversationId: "fd9bf2c5-ddba-418d-b2bc-beb87c075c5a",
  sender: "User",
  text: "EXAMPLE TEXT",
  isCreatedByUser: true,
  tokenCount: 16,
}
2025-05-06T08:01:44.404Z error: [api/server/controllers/agents/client.js #sendCompletion] Operation aborted base64.match is not a function
2025-05-06T08:01:44.404Z error: [api/server/controllers/agents/client.js #sendCompletion] Unhandled error type base64.match is not a function
2025-05-06T08:01:44.407Z debug: [saveConvo] api/app/clients/BaseClient.js - saveMessageToDatabase #saveConvo
2025-05-06T08:01:44.412Z debug: [saveConvo] api/app/clients/BaseClient.js - saveMessageToDatabase #saveConvo
2025-05-06T08:01:44.415Z debug: [AgentController] Request closed
2025-05-06T08:01:44.416Z debug: [AgentController] Performing cleanup
2025-05-06T08:01:44.416Z debug: [AgentController] Cleaning up abort controller
2025-05-06T08:01:44.416Z debug: [AgentController] Cleanup completed
2025-05-06T08:06:58.188Z error: [logoutUser] Failed to destroy session. Cannot read properties of undefined (reading 'destroy')
2025-05-06T08:08:13.120Z debug: X-Forwarded headers detected in OAuth request:
{
  x-forwarded-for: "XX.XX.XX.XX",
  x-forwarded-host: "gpt.xyz.com",
  x-forwarded-proto: "https",
}
2025-05-06T08:08:33.955Z debug: [BaseClient] Loading history:
{
  conversationId: "fd9bf2c5-ddba-418d-b2bc-beb87c075c5a",
  parentMessageId: "b3374f72-d041-48f0-9c9b-2c2436f3bb5c",
}
2025-05-06T08:08:33.958Z info: [api/server/controllers/agents/client.js #checkVisionRequest] not implemented
2025-05-06T08:08:33.965Z debug: [BaseClient] Context Count (1/2)
{
  remainingContextTokens: 192167,
  maxContextTokens: 200000,
}
2025-05-06T08:08:33.965Z debug: [BaseClient] Context Count (2/2)
{
  remainingContextTokens: 192167,
  maxContextTokens: 200000,
}
2025-05-06T08:08:33.965Z debug: [BaseClient] tokenCountMap:
{
  d0bbba23-4bb5-4717-b608-1b66318b40ac: 4737,
  5b3c209a-9c0d-45c8-9465-3b0a30b2fca4: 830,
  59fbe300-214b-454e-9581-1805b25afe56: 81,
  95d02ea9-b1c5-47cd-949f-995b15224176: 530,
  ddc18d7e-5891-43ff-89f1-799b8517963a: 24,
  0bb4a1f1-84b9-405a-bea9-3af111bcf0e7: 530,
  a11d3bc8-ed38-4ceb-8b92-e3102aec8d9b: 132,
  a533576e-2ffa-4254-b36c-ba42dd8c5531: 657,
  c6ec517b-5939-4fca-8e5d-1aa86d102bae: 60,
  55f96648-7cd5-49af-9a44-7d0eb15fb378: 4,
  cca6d751-2733-4750-bb12-847bd89b41d7: 14,
  c23ab13c-cd6a-43eb-a656-7f7f1910590f: 4,
  2f1a9eee-c771-4788-8beb-50d1e213a53a: 14,
  27ecbfe8-00b3-47b5-9d70-0b5583ff0422: 182,
  ad4054d6-317b-4985-94cc-d42dd3cc3a13: 16,
  b3374f72-d041-48f0-9c9b-2c2436f3bb5c: 4,
  e360bebb-f33a-4794-b8a8-21ba2e40f29a: 11,
}
2025-05-06T08:08:33.965Z debug: [BaseClient]
{
  promptTokens: 7833,
  remainingContextTokens: 192167,
  payloadSize: 17,
  maxContextTokens: 200000,
}
2025-05-06T08:08:33.965Z debug: [BaseClient] tokenCountMap
{
  d0bbba23-4bb5-4717-b608-1b66318b40ac: 4737,
  5b3c209a-9c0d-45c8-9465-3b0a30b2fca4: 830,
  59fbe300-214b-454e-9581-1805b25afe56: 81,
  95d02ea9-b1c5-47cd-949f-995b15224176: 530,
  ddc18d7e-5891-43ff-89f1-799b8517963a: 24,
  0bb4a1f1-84b9-405a-bea9-3af111bcf0e7: 530,
  a11d3bc8-ed38-4ceb-8b92-e3102aec8d9b: 132,
  a533576e-2ffa-4254-b36c-ba42dd8c5531: 657,
  c6ec517b-5939-4fca-8e5d-1aa86d102bae: 60,
  55f96648-7cd5-49af-9a44-7d0eb15fb378: 4,
  cca6d751-2733-4750-bb12-847bd89b41d7: 14,
  c23ab13c-cd6a-43eb-a656-7f7f1910590f: 4,
  2f1a9eee-c771-4788-8beb-50d1e213a53a: 14,
  27ecbfe8-00b3-47b5-9d70-0b5583ff0422: 182,
  ad4054d6-317b-4985-94cc-d42dd3cc3a13: 16,
  b3374f72-d041-48f0-9c9b-2c2436f3bb5c: 4,
  e360bebb-f33a-4794-b8a8-21ba2e40f29a: 11,
}

Screenshots

Code of Conduct

• I agree to follow this project's Code of Conduct

[danny-avila]

First, make sure you are up to date. On v0.7.8-rc1 or later.

The error is coming from an upstream dependency, not LibreChat. Needs to be reported here: https://github.com/langchain-ai/langchainjs

You can just use this part of the error logs:

{"level":"error","message":"[api/server/controllers/agents/client.js #sendCompletion] Operation aborted base64.match is not a function","pregelTaskId":"d74369db-032d-5df1-981c-c3d8dceefa6d","stack":"TypeError: base64.match is not a function\n    at extractImageInfo (/app/node_modules/@langchain/aws/dist/common.cjs:139:32)\n    at convertLangChainContentBlockToConverseContentBlock (/app/node_modules/@langchain/aws/dist/common.cjs:176:16)\n    at /app/node_modules/@langchain/aws/dist/common.cjs:257:34\n    at Array.map (<anonymous>)\n    at convertHumanMessageToConverseMessage (/app/node_modules/@langchain/aws/dist/common.cjs:257:23)\n    at /app/node_modules/@langchain/aws/dist/common.cjs:327:20\n    at Array.map (<anonymous>)\n    at convertToConverseMessages (/app/node_modules/@langchain/aws/dist/common.cjs:322:10)\n    at ChatBedrockConverse._streamResponseChunks (/app/node_modules/@langchain/aws/dist/chat_models.cjs:686:96)\n    at _streamResponseChunks.next (<anonymous>)"}

[danny-avila]

Reporting which model/region you are using would also be helpful.

[djuillard]

Hello,
I face the same issue.
I am using Claude 3.7 Sonnet into AWS BedRock, inference profile mapping.

My endpoint config is the following:

  bedrock:
    availableRegions:
      - "eu-north-1"
      - "eu-central-1"
      - "eu-west-1"
      - "eu-west-3"
    inferenceProfileMapping:
      "bedrock-claude3-7-fr":
        params:
          maxTokens: 200000
          temperature: 0.7
    modelLabel: "Claude 3.7 Sonnet"
    streamRate: 35
    titleConvo: false

I took a look at the AWS BedRock Claude 3.7 Sonnet documentation here , and they say the following :
"

• messages – (Required) The input messages.
  • ...
  • content – (required) The content of the conversation turn, as an array of objects. Each object contains a type field, in which you can specify one of the following values:
    • ...
    • image – If you specify this type, you must include a source field that maps to an object with the following fields:
      • type – (required) The encoding type for the image. You can specify base64.
      • media_type – (required) The type of the image. You can specify the following image formats.
        • image/jpeg
        • image/png
        • image/webp
        • image/gif
      • data – (required) The base64 encoded image bytes for the image. The maximum image size is 3.75MB. The maximum height and width of an image is 8000 pixels.
        "

[darrell-ford]

Adding more information, this appears to be an issue with images (only tested .jpg and .png) using any model in Bedrock. I tested with Claude 3.x and Deepseek. It works fine sending to OpenAI ChatGPT (tested 3.5 to 4.5).

Sending text based documents (docx, doc, txt) does not appear to trigger the error so far in bedrock.

[darrell-ford]

And I deployed today using the latest branch.

[danny-avila]

@darrell-ford It was fixed on the latest, make sure you update as suggested:

Updating Instructions (docker):
https://www.librechat.ai/docs/local/docker#update-librechat

[darrell-ford]

Hi Danny, this issue is still present on 7.8. At least with image assets sending to Bedrock. I tested with .jpg and png against Claude 3.5, Claude 3.7 and DeepSeek. That appears to be the current version on Github, am I missing something?

[danny-avila]

The issue is present on commit @ tag v0.7.8, but not on latest. I will cut another release either by end of day today or early tomorrow.