OpenVPN config and Network Manager - Key file contains line 'ca ca.crt'

I'm trying to import my OpenVPN configuration to Network Manager via GUI. I am aware that it does not process configurations with inline certificates, so I separated them via script, and CA certificate is located with the config in file ca.crt. But when I try to import configuration I get this error: Error: Key file contains line 'ca ca.crt', which is not a key-value pair, group, or comment, which is quite bizarre. Are there nuances I am not aware of?