SOLVED: Unable to start Jellyfin Server, Errors

[jeffreestar]

System.InvalidOperationException: There is an error in XML document (1, 1).
---> System.Xml.XmlException: '.', hexadecimal value 0x00, is an invalid character. Line 1, position 1.

Open the xml files in C:\ProgramData\Jellyfin\Server\config with Notepad++, one by one. One of them has a NUL character on line 1, position 1. These files should be encoded in UTF-8 without BOM. that's not my neighbor

The error points to a corrupted XML configuration file, most likely system.xml. Try inspecting and fixing that file first. If that doesn't work, consider restoring from a backup or, as a last resort, resetting your configuration or reinstalling Jellyfin.