Processing Toolbox missing after I copied a python script from the Scripts folder to my local folder, and QGIS crashes when I try to active the "Processing" under the Plugin Manager
Re-installation also doesn't work! QGIS crashes when I try to activate it using Plugins Manager
It looks like, no one has encountered this problem!!!
There is something getting saved somewhere, or some settings getting saved somewhere, these are stopping the Processing Toolbox getting activated even after repeated installations. Cleaning of all the folders also doesn't help. Installing of stable versions also doesn't solve this problem.
If some source code is available where the Processing plugin within the Plugin Manager can be changed, perhaps might solve the problem. Developers may please help!
Otherwise, the only solution, to my mind, appears to be to reload the OS (in my case, Windows 64-bit) and install the QGIS application if one really wants to work with the Processing Toolbox!
Interestingly, when I added another login account in this PC, the Processing Toolbox is coming in the QGIS in this new login account! However, I did not install QGIS in this login account separately. This shows some settings got permanently changed in the previous login account where the Processing Toolbox still doesn't appear!