@MordyT Interesting. I have never seen this error before. Yes, it's safe to re-install, but backup "meshcentral-data" and "meshcentral-files" first. "meshcentral-data" contains the critical certificates that make your server unique. Agents will not reconnect unless you have the right certs. At any time, you can re-install your server and put the "data" and "files" folder back and restart and you should be fine. If you are using MongoDB, make sure to backup the database on a regular bases. If you are not using MongoDB, NeDB will be used and all ".db" files will be in the "meshcentral-data" folder.
Basically, should be easy to recover. Please don't hesitate to ask if you need help.