The processing toolbox stopped working in the previous QGIS 3 ltr version I had installed. Now installed 3.4.13 but processing toolbox still not working. I've tried changing the GRASS path without success but none of the processing providers algorithms work - SAGA, etc. I have seen that 3.4 version has some issue with GRASS and so tried to use the Osgeo installer. With this a message displays stating that the GRASS module path is wrong.
I have checked and it seems to be correct.
I really don't know what else to do. I've installed/reinstalled using both the network installer and standalone installer many times.
QGIS also crashes with the following message
If I add a modified bat file do I need to do anything else?