Login issue

[Phoenix1000]

Hello Efficient_Good_5784,

thank you for your fast response. First to your last point: No, I did not transfer anything from the "native" Jellyfin installation to the Docker container. I've used Jellyfin only as a media player for my own created small videos / timelapse movies on the Synology DS. There is no "individual" content in Jellyfin from me - at least not until today. 

Second to your first point: Please find the first screenshot of the Container Details in Portainer for the upper part. Perhaps you have already hit the problem: The "data" folder points to "config" - that doesn't seem right, does it? The question for me is now: How can I change this?

Via "Container Inspect" in Portainer I find some kind of configuration file - please find second screenshot (again the upper part). Here I find the following entry:

<"JELLYFIN_DATA_DIR=/config",>

I guess, the value "config" needs to be changes to "data", right? If so, how is the name of this file and where do I find it?

So if this perhaps already the problem and it's solution, I would wait with uploading any log files a minute. 

Thanks again.