After updating to Kubuntu 22.04 my OpenVPN stop working with an error like:
OpenSSL: error:0A00018E:SSL routines::ca md too weak
Cannot load inline certificate file
Exiting due to fatal error
The correct way to solve this issue is certificate regeneration, but I do not control the server. So
the temporary solution is to add the line tls-cipher "DEFAULT:@SECLEVEL=0" into ovpn config
file. It allows OpenVPN to use weak tls cipher, so the connection starts as usual.