Error code: 90010 - Maximum number of channels per connection exceeded

This means your Realtime client has attached to more channels than your account will permit on a single connection.  Typically this happens because customers attach to channels on connections, but never explicitly detach from them.

The support article "Is there a maximum number of channels per connection?" has some suggestions for things to try and ways around this.

You can also review your all your account limits and get in touch with us if you need help getting your limits modified