I've just installed qgis via OSGoe4W custom install on a brand new windows 10 machine. in the desktop section of the install dialog I've selected grass 7.8.3-1 in libs section QGIS-GRASS-plugin7 for QGIS 3.14.16-3 as well as for QGIS ltr version 3.10.10-3
the installation ran without any troubles.
trying to run any GRASS function via processing toolbox returns the following error:
"the specified GRASS 7 folder "C:\OSGEO4~1\bin\bin" does not a valid set of GRASS 7 modules. Please, go to the Processing settings dialog, and check that the GRASS 7 folder is correctly configured"
searching StackExchange returned some promising results - like GRASS not working with QGIS 3.7 (and it's predecessor-article for QGIS 3.6 as well) where one user suggested tweaking QGIS settings via "Settings -> Options -> Advanced -> Configuration" and set the current Grass7 path explicitly.
but my problem is, that neither QGIS ltr/3.10 nor QGIS 3.14. do show a "GRASS Folder" entry in the Advanced Settings Editor - see the following screenshot:
so I do not have any option to identify the GRASS path in the same way as described in the before-mentioned posting.
the remarkable thing is that version 3.14. on mac osx looks different:

and ist works perfectly ...
