My friend is currently having a problem opening up his server (not dedicated). He received an error message titled "Sqlite Error", and results in Blockland shutting down. My friend doesn't want to re-install the game, afraid that he might lose or corrupt his add-ons folder.
Here is a screenshot of the error message:

He has already tried port forwarding, but was unsuccessful because another device in his network was using the same port range. I would appreciate if anyone could help us find a solution, without the need to uninstall Blockland.