Cannot run a simple routine after downloading 3.0.5

If this template helps then use it. If not then just delete and start from scratch.

Win 7
PsychoPy version (e.g. 1.84.x):3.0.5 (win64)
Standard Standalone? (y/n) If not then what?: yes
I tried to: run a simple test program. Text + space to end the routine. When I click the run button nothing happens. In the Coder view the following message appears:
4.5824 WARNING Monitor specification not found. Creating a temporary one…

I never had problems with the program in the past. I downloaded the recommeded version of PsychoPy 3.0.5 (Py2 and Py2_3 is also installed).

Does anybody have an advice?
Thank you very much!
Best,
M

That is not an error message. It just tells you that the default settings for the monitor will be used.
Do you get any other error message?
Did you try whether the demos run?

Hi LukasPsy

No, there are no other error messages. Demos do also not run.

Best,
M

Are there any other options I can try?

Thank you very much!

Without an error message, I cannot guess what might be amiss.

Do you know for a fact that it is possible to have PsychoPy2_3 and PsychoPy3 installed at the same time? Perhaps you might want to uninstall both and do a clean install of PsychoPy3 again?