How to fix it ?

[spice peak]

gives the following error when logging in from bedrock. play through Aternos

[visual hornet]

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.

[winged nebula]

!!logs