It is impossible to log in to the server

[grizzled root]

Hi guys, suddenly the geyser stopped working on my friend's server, the error is unknown because, according to him, he cannot view the error. I only have a screenshot of the error from minecraft.
I am not very familiar with the geyser so I will be glad of any help

[strange saddle]

Found errors in the image!

ClosedChannelException

This error can be caused by various things. Please upload your logs using https://mclo.gs/ and paste them in #support.
If you are getting this error on a proxy server such as Velocity or BungeeCord, check your backend server logs for errors.

[hardy ridge]

!!logs