Problems downloading or updating WhatsApp - If you're experiencing issues when downloading or updating WhatsApp from Google Play Store, it's probably due to one of
METHOD 1 TO FIX/REMOVE UNKNOWN ERROR 919 WHILE INSTALLING OR UPDATING APPS FROM PLAY STORE: Clear cache files and transfer apps from phone memory to internal memory.
To fix these errors, follow these steps in the order listed below. Continue to the next solution only if a previous solution doesn't resolve the problem.
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Error: Failed to determine the detail of your Qt installation. Try again using the --verbose flag to see more detail about the problem. I added C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\bin (contains nmake.exe) to PATH and I got this error: Querying qmake about your Qt installation Determining the details of your Qt installation