Trying to create a grid from a shapefile (using canvas extent), but when I click 'run', it tells me it is 'Processing algorithm...' and then hangs on this indefinitely without progressing (with my Mac often telling me to Force Quit QGIS as the programme is not responding). EPSG is 4277 - OSGB 1936.
I've tried this on QGIS 3.4.1 and 2.18.0 and the same is happening on both.
Am I doing something wrong?
I'm new to using QGIS (following someone else's instruction sheet) and this is the extent of the instructions I have been given.
What should I be selecting for the different options in the 'create grid' interface?
This is what I've got so far. I know those warning triangles shouldn't be there, but I haven't been able to work out how to get rid of them. Increasing the degrees figure doesn't seem to change anything.