Whenever I try to connect to any server with create, I get this error. Connection Lost Internal Exception: io.netty.handler.codec.DecoderException: Badly compressed packet - size of 2162670 is larger then protocol maximum of 2097152.

This issue has been marked as stale because it has been inactive for 3 weeks. It will be closed if it remains inactive for another 3 weeks.

This issue has been closed since it has been inactive for 3 weeks since it was marked as stale.

Is the github-actions bot okay? It was inactive for a year, not 3 weeks

I also get this. A quick google search tells me it might be to do with there being too much data in a chunk on the server.

My findings:
We were updating our modpack and added a couple decorative mods, including Create. To do this, I made a backup of the current server and loaded that backup for the test server while applying new mods, just so I can test compatibility etc. When logging in for the first time, everything seemed to be fine. When leaving and rejoining, I was hit with the above lad's error and was unable to join the server.

Restoring the test server to the backup point while keeping the same mods allowed me to join again, and then stopped me from reconnecting to the server with the same error. I repeated this 5 times and got the exact same result.

After removing Create from the list of new mods for the test server, I didn't even have to restore the test server to any backup for it to let me in. I have also restored the server to the backup point and avoided adding Create, then connected several times without fail.

The below is just my uneducated rambling but I will mention it in case it's helpful for finding a solution.
Whether or not this is caused by Create being a part of big modpacks is beyond me. Forge recently pushed an update which splits packets to allow bigger modpack servers to connect players (previously they were just timed out on connection attempt), however since the last version of Create was in January, perhaps something isn't working in that regard.