Unable to retrieve containers: Unauthorized

[jetliner707]

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Dear Portainer experts,
I'm running Portainer on a Synology NAS and I tried to pull Nginx proxy Manager v2 with Sqllite as a container from the Application templates list when I experienced this error:

Unable to retrieve containers: Unauthorized

URL for app templates is https://raw.githubusercontent.com/pi-hosted/pi-hosted/master/template/portainer-v2-amd64.json

I tried to pull other containers and the error was everytime the same. I'm using Portainer version 2.27.9 LTS. Since I only possess the community version, there are no further logs unfortunately.

Does anyone may know what is the source of the error?

My apologies, if this bug has been discussed already several times before but I did't find any similar issue.

Thank you so much in advance !

[Nick-Portainer]

Please try the version 3 of this - https://raw.githubusercontent.com/pi-hosted/pi-hosted/master/template/portainer-v3-amd64.json In the newer versions of Portainer the format must be version 3 to support app templates.

[jetliner707]

Thank you so much! That helped!
I already looked after my firewall and port settings with no result.