Local linking doesn't work on proxy when another plugin uses SQLite

[StKillReal]

I have velocity proxy with 2 connected servers with floodgate installed on each of them. When I put sqlite database jar in /proxy/plugins/floodgate/ folder and enable local linking on proxy floodgate config.yml, I still can't link accounts on none of backend servers. Should I enable local-linking inside of each server floodgate config or what should I do?
When I try to use /linkaccount for testing on any of backend servers I get "Linking is not enabled on this server"

In proxy console I get this error:
https://pastebin.com/ur5BpX8F

I'm using latest versions of each plugin
Auth type: floodgate

[bloxded]

there is a config you need to enable in both folders in the proxy and the server

[Konicai]

linking configuration on the backend server shouldn't/doesn't matter

[StKillReal]

You guys say opposite things

[Tim203]

Looks like another plugin is using SQLite as well.
This will be fixed in the upcoming Floodgate 3.0