I checked with them and myself and it appears that all the files are there on my (client) end and that (server) end. Any other thoughts? I appreciate your help so far.
edit: I have the output_log from my server which may have information that would be helpful, but also a lot of identifying information on my server that I don't want to make public. I can PM it to you if you want.
edit2: saw this line which may have something to do with it?
2019-02-04T20:33:22 36144.840 WRN Spawned entity with wrong pos: [type=EntityPlayer, name=Pale_Rider, id=172] id=172 pos=(0.0, 0.0, 0.0)
Spawning me at 0,0,0 seems like a bad idea...?
edit3: Still no progress. Tried renaming the game in the config, deleting profiles, changing profiles, and I think the only option left is a full wipe and reinstall of the server. I'm hoping you've got another idea before that though.