procedure entry point.... error

Hi, I use Qt in visual studio 2019, with qt 5.15.0 (qt tools version 2.5.2.1)

well
Runtime errors occur in the following situations:

runtime error message is [Error.png]

 
i guess..

The dll file in the left 5.15.0\msvc2019_64\bin folder is pasted into the execution folder, and it's solved.
I can guess it's an environmental variable problem.

But I've set the right environment variable, but it doesn't work.
 
 
 
Did I make any mistakes?

Oh, for your information, I'm installed version 5.9.6 and version 5.15.0 on one PC.