pyinstaller - when freeze the app QtWebEngineWidgets throws dll error

Question

I have a code that have QtWebEngineWidgets module from PyQt5. it works fine in raw form (.py) but throws the following .dll and openGL missing error when freeze through pyinstaller. PyQt5 and pyinstaller are both upto date.

Also, for your information, i am running this code on amazon c2 instance.

Answer 1

from the issue of Anaconda, the following command when run on the cmd, the error will be fix

set QT_OPENGL=desktop

solution in Anaconda Issues