Modrinth App creates an empty servers.dat file (presumably when the player has no Modrinth Servers linked to their account), which is breaking Default Options.

Upon further thought, I don't think this is a good idea. It leads to unexpected behavior when you delete a server from the list, in that it will reappear on every launch. I think this is better fixed in the Modrinth App. They should not be pre-initializing files for no reason, and if they do, they should provide an option to disable.