Viaversion is not working on server 1.17

Hello Aternos Team.

I don't know if it really doesn't work in version 1.17 or it's just my server.

When starting my server in version 1.17 in the registry I get an error with the Viaversion.

I need Viaversion + ViaBackwards to invite my friends from 1.16.5 and another olds versions

This is log:

https://mclo.gs/rL1XQv1

Thanks.

Quote from Roman

Was this server running on 1.16.5 before and did you update Geyser after updating your server?

No, this server was created recently in 1.17 together with the Geyser

There were no version updates.

Quote from Roman

Then I'd recommend you to ask the plugin creator.

Thanks, although I tried to create the server in 1.16.5 and yes, the viaversion works and with the geyser if it lets in the bedrock from 1.17

since the geyser is only for those of that version to enter I think.

One more quick question, can I change the software from papermc to mohist without losing or damaging the world?