I tried to install paraview manually as you suggested, however cmake is reporting some error messages:
You have answered a similar question already in this forum where someone had the very same problem. After that error message I called cmake via:
cmake -DQt6_DIR=<Path/to/my/downloaded/version> …/paraview
Unfortunately the error message is not gone. I am not quite sure if my downloaded Qt, which I pass to cmake, is correct. Here is a screenshot of the folders I got after extracting Qt6:
Inside this folder I passed the cmake folder to cmake via -DQt6_DIR=… Is this correct?
By the way, the cmake error wants “Qt5 external dependency”, however I downloaded Qt6. Can this be a problem as well?