I got them to work, but i had to add the BPL files manually.
I had to ‘install components’, go to
C:\Users\Public\Documents\Embarcadero\Studio\23.0\CatalogRepository\KonopkaControls-290-8.0_For12.3\Bin\Win64
and install both BPLs from there.
I guess there’s something wrong in the installation script.
The path for the source was already correct in the 64BIT IDE.
Kind regards,
Erik