Strange problem: dclxdata290.bpl can not be found

Your PATHs are wrong, but I'm not sure if this was caused just by you copying/pasting them.

But your Windows system PATH has this:

C:\Program Files\TortoiseGit\bin
D:\Komponenten\tmssmartsetup.tmssetup\build\bpl\Win32;

Note the missing ; after C:\Program Files\TortoiseGit\bin, and note the missing \ between tmssmarsetup and .tmssetup

Same thing happen in your Delphi PATH environment variable override, even though that is wrong according to the link I sent you. That override should not have the Windows system PATH variables, but just the $(PATH) macro: