If you have seen this error message, then it 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.
Resolving this problem:
- We recommend you read the support article "Is there a maximum number of channels per connection?"
- You review your all your account limits and get in touch with us if you need help getting your limits modified