There are two exact same machine I run with Xubuntu 20. With one the Outline client connect ok but on the other it keeps deleting the connection_store file resulting in an error. chmod 555 on the file didn't help it still gets removed. The Outline client and manager are of the latest version.
What was it?
The error output is similar to the many issues on Github:
Could not load active tunnel: [Error: ENOENT: no such file or directory, open '/home/*/.config/Outline/connection_store'] { errno: -2, code: 'ENOENT', syscall: 'open', path: '/home/*/.config/Outline/connection_store'}