Recently upgraded to QGIS3 (3.0.2) for MacOS (High Sierra) and encountered GRASS (7.2.2) issues. Tried adding a custom variable and now when running GRASS algorithms (e.g. r.reclass) I get the following error:

WARNING: Default locale settings are missing. GRASS running with C locale.

Starting GRASS GIS...

ERROR: Path '//' doesn't exist

Default locale not found, using UTF-8


The GRASS7 Path in Settings --> Options --> Processing seems to be correct. What am I missing? GRASS7 path


Please try installing the new QGIS 3.4. I had the same issue, it has now been fixed.

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