Oqallisissiat Howard Miller-imit allatat

Core developers-ip assinga Documentation writers-ip assinga Particularly helpful Moodlers-ip assinga Peer reviewers-ip assinga Plugin developers-ip assinga
If you can't find the 500 error in the logs then you are looking in the wrong log. Additional information (that we hope) is logged along wth the 500 will give you a vital clue. 500, on its own, tells you little or nothing.
Core developers-ip assinga Documentation writers-ip assinga Particularly helpful Moodlers-ip assinga Peer reviewers-ip assinga Plugin developers-ip assinga
I suspect that it's unlikely anybody in these forums will know.

You'll probably do better asking in the module's issue tracker... https://github.com/Wunderbyte-GmbH/moodle-local_wunderbyte_table/issues