Wanted to make a more viewable report/post. Doing this to create a more complete writeup on the issue, and perhaps a place for others to make the report when it comes up. Unfortunately this is about the extent of the details I am able to provide at the moment and I know that none of it is very informative, but rather vague.
Back on July 30th 2021, the wiki goblins came across an issue where we were unable to submit updates to https://wiki.efupw.com/index.php?title=Spell_changes and the last change to that page before then was April 20th 2021. Something around that time may have changed on the backend, I am unsure, but ever since that date we've slowly come across where we can no longer update certain pages as well. Before then we had not noticed this problem and it's only gotten worse with time, becoming more frequent/rampant. There seems to be no common issue, and we've attempted to use alternative browsers, change the formatting, use no formatting, etc.
Currently, all I have to do is attempt to edit the existing page of Spell Changes, change absolutely nothing and save the changes, which will immediately prompt the Internal Server Error. This is also a problem all over the wiki, as we can no longer edit most of the pages with a greater amount of content. The smaller pages appear to be mostly fine. This was for three different wiki goblins/editors and all occurred on the same pages for each of us.
Other cases of this happening when people attempt to submit data have been submitting tickets on the forums, making forum posts/replies on the forums, submitting applications, making any new wiki pages, and editing existing wiki pages. I understand that this can be many different possibilities, but it does appear that players have been trying different browsers as well. I've never encountered this issue with trying to load anything on EFUPW, but instead it always comes up when trying to submit information to be added. Thus far I have never noticed an issue with just reading anything that already exists.