Looks like your server is having some hiccups when attempting to create/write to a tmp folder – however that doesn’t seem directly linked to any crashes.
As for “constantly crashing” – the only thing coming close to that is that your server at some point got triggered for what appears to be a regular shutdown (not sure if it’s just shutting down Plex or the entire server)
e.g.
May 18, 2021 20:57:33.636 [0x7f7c0403cb38] DEBUG - Shutting down with signal 15 (Terminated)
May 18, 2021 20:57:33.636 [0x7f7c0403cb38] DEBUG - Ordered to stop server.
May 18, 2021 20:57:33.636 [0x7f7c0414ed30] DEBUG - Stopping server...
May 18, 2021 20:57:33.636 [0x7f7c0414ed30] DEBUG - HttpServer: Stopping server.
May 18, 2021 20:57:33.636 [0x7f7c00d9fb38] DEBUG - MetadataItemClusterRequestHandler: a shutdown event has been received
all in all plex runs extremely bad lately …
menu’s loading very often for 10+ seconds… the next one loads fast as usual
also this happens more often on android, followed by roku… sometimes while those are loading forever, web loads instantly. can’t be the sever or connection. it has to be plex itself.
with plex library on a nvme…
i have some guessing that this is since i updated to the offcial Media Agents …