@DragonRage508 thanks for posting this. As @Hicsy mentioned this has to do with a token expiry after being logged into the editor for a long time.
You should be able to reauthenticate with the “login” button in the “Project” dropdown (with the island icon next to it) and then proceed with any of the syncing and checking in changes.
Can you provide a bit more context on not being able to save though? Which Save button (or shortcut) are you using that is not working. Are you getting a specific error when the trying to perform this save?
Also @Hicsy, though we don’t yet support rolling back to an older URC version within the UI, we recently published a document covering the URC CLI and have included there instructions on how to check in an older snapshot as the latest. You can find that document here. Hope that helps you in the meantime!