Use Select by Expression from the attribute table to select polygons of "MUNICIPIO"=5 and use Fixed Distance Buffer for the selected polygons.
Use Fixed Distance Buffer from SAGA tools which you can find it from Processing toolbox -> SAGA -> Vector General tools -> Fixed Distance Buffer. It should work.
Make sure that Use only selected features option is checked from the Processing Option. It should be checked by default.
Use Select by Expression from the attribute table to select polygons of "MUNICIPIO"=5 and use Fixed Distance Buffer for the selected polygons.
Use Fixed Distance Buffer from SAGA tools which you can find it from Processing toolbox -> SAGA -> Vector General tools -> Fixed Distance Buffer. It should work.
Make sure that Use only selected features option is checked from the Processing Option. It should be checked by default.
Use Select by Expression from the attribute table to select polygons of "MUNICIPIO"=5 and use Fixed Distance Buffer for the selected polygons.
Use Fixed Distance Buffer from SAGA tools which you can find it from Processing toolbox -> SAGA -> Vector General tools -> Fixed Distance Buffer. It should work.
Make sure that Use only selected features option is checked from the Processing Option. It should be checked by default.
Use Select by Expression from the attribute table to select polygons of "MUNICIPIO"=5 and use Fixed Distance Buffer for the selected polygons.
Use Fixed Distance Buffer from SAGA tools which you can find it from Processing toolbox -> SAGA -> Vector General tools -> Fixed Distance Buffer. It should work.
Make sure that Use only selected features option is checked from the Processing Option. It should be checked by default.
