Like kelseashanty, I opened Tropy to continue working on my project and got the following message: “SQLITE_CANTOPEN: unable to open database file”
Here are some screenshots of the log:
I would really appreciate any help with this issue- it came out of nowhere!
The forum will only let me post one picture at a time- but here is another pic of the log: 
Can you send me the Dissertation.tpy file? You can send it to sylvester.keil@gmail.com if you don’t want to post it here.
Just following up here, in case someone else runs into this, that the issue was probably iCloud locking the file, pending and update.
