Hi, I currently own a server with venturechat, this plugin requires ProtocolLib to run. However, ProtocolLib has 3 different versions based on your game version; 1.19 and under use the regular, 1.19.1-1.19.2 need the 606 build, and finally, 1.19.3 requires the latest dev build. The problem is, the only available plugin on the dashboard is the regular release. And sadly, aternos disables custom, uploaded plugins because they pose a security risk. All these factors combined result in many plugins being inaccessible for 1.19.1+. I highly recomend added these versions of protocolLib for the latest minecraft versions.
Thank you,
Mr.Void