Hello!
The Express VPN interface causes a critical error to OpenVPN:
Tell Eddie to ignore any alien interface:
Select from Eddie's main window Preferences > Networking,
write eddie in the "VPN interface name" field
click Save.
You may also consider to switch to WireGuard to bypass the alien interface. You can do it in Preferences > Protocols window. Uncheck Automatic, select a WireGuard connection mode and click Save.
Kind regards