@astoffregen said in QT5 on Ubuntu 22.04 on arm64 missing modules:

I tried to install the libs via apt install, but I always get the info that they are already installed in never version.

Please show what you tried and what error message you get.
When you installed a new version of Qt5 then you should sync all packages to the same version.

Hi and welcome to devnet,

A VM is not a problem, you can install and do Qt 5 development on e.g. VirtualBox, VMWare or Parallels without any problem.

However, it's not sure that Cloud9 provides an X server which is needed to use the xcb plugin.

You should check with the Cloud9 people about that.