This has been plaguing us for a few months now. Nothing has changed on the hosting side, uploads used to be error free. Limits are where they should be. The problem is it pops up with a -200 error when uploading, but only sometimes. I have noticed that if you just try over and over it will eventually upload just fine, but sometimes it takes 5-20 times to go through. I have a video showing it. This happens anywhere uploads are available: posts, promotions, Downloads files area, etc. All have the issue.
https://streamable.com/renydj
Any ideas what is causing this? We are on the most recent version. We are on an OVH VPS with overkill specs, so I doubt it would be a resource issue. The limits seem to be fine since it does actually get through eventually.