Fixed it the 'hard' way :P
To be sure I backed up these files (the files listed as errors in the installation of lib32-nvidia-utils) in /usr/lib32 into a dir I created then I removed them by 'rm'.
I after that installed these packages:
nvidia nvidia-utils lib32-nvidia-utils nvidia-settings vulkan-icd-loader lib32-vulkan-icd-loader. Most of them already was installed but...
I crossed my fingers and rebooted... and it worked, now at least my test game work.
Gonna do some more testing but so far so good
Gonna mark this as SOLVED