Go to folder %AUTINSTLOG%, and view the SIA install log file. Check especially for Visual C++ redistributable errors. Actually, I got this advice from here (you'll need to translate to english): https://support.industry.siemens.com/forum/de/de/posts/tia-v16-installation-fehler-vorraussetzung-dummy/235761/?page=0&pageSize=10
– Cliff PennalligenNov 15 '22 at 08:34
If you are referring to the error message with the word "dummy", yes it's a thing as per the SIOS forum post above. I suppose they forgot to add a description for this type of error in the installer. The key thing is to check the install log.
– Cliff PennalligenNov 21 '22 at 08:18