The "path" argument must be of string. Received null

[Level0r0s]

Alter install, on upload video.

NodeJS V14.17.4
Ubuntu 18.04

Unhandled Rejection at: Promise Promise {
TypeErro [ERR_INVALID_ARG_TYPE]: The "path" argument must be of string. Received null
at validateString (internal/validators.js:124:11)
at Object.extname (path.js:1358:5)
at getMediaType (/home/usuario/nodetube/lib/uploading/media.js:12:24)
at $post (/home/usuario/nodetube/lib/uploading/resumable.js:99:7)