Yikes! That’s no fun. Let’s see if we can’t get you fixed up.
Second things first: after we get your LibO install back up and running, if you are able to repeatedly recreate the issue (both LibO quitting with an error, and leaving you in an unusable state), then the best thing you can do for the community and the next user in your position is to report the bug.
First things second: The ham-handed approach would be to (re)move your LibO profile. While troubleshooting, this is generally the last thing you should do, but it also often the quickest route workaround for some bugs. Thus, for expediency, try renaming or moving your profile folder.
(If you have no settings you want saved, you could also just remove the folder. LibO will automatically regenerate it when launched.)