This application failed to start because it could not find or load the Qt Platforms

Hello Angel, thank you for the report.

Which interpreter do you use? Are you able to reproduce the problem with another interpreter?

I had the same problem, because I had changed the folder name of my python-env (conda).
In python-env\qt.conf, the old folder name was still in place and therefore qt was not found.

I'm getting the same error when trying to install the "jetbrains-toolbox-1.16.6319.exe".

It looks very similar to https://stackoverflow.com/questions/41994485/error-could-not-find-or-load-the-qt-platform-plugin-windows-while-using-matplo but I'm not sure where the QT dll is located.

To fix the problem:

1. Find "QT_PLUGIN_PATH" in your environment variables.
2. Rename in "_QT_PLUGIN_PATH"

Note this is a temporary fix, since it will most like negatively impact the other programs that were using "QT_PLUGIN_PATH".  You may have to keep change the environment variable name when running different program.  JetBrains should be able to provide a cleaner solution.