With the Inkscape binary in a directory with a space in the name, I tested a few extensions;
Inset/Outset halo - OK - works perfectly
Render Grid - OK
Dimensions - no such file or directory upon apply
Extrude - no such file or directory
Interpolate - no such file or directory
Add Nodes - no such file or directory
Edge 3D - no such file or directory
Pattern Along Path - no such file or directory
Render barcode - no such file or directory
If I quit Inkscape, and then rename the directory back to without spaces, all work perfectly. Can you notice a pattern with the two that do work? Probably not important.
With the Inkscape binary in a directory with a space in the name, I tested a few extensions;
Inset/Outset halo - OK - works perfectly
Render Grid - OK
Dimensions - no such file or directory upon apply
Extrude - no such file or directory
Interpolate - no such file or directory
Add Nodes - no such file or directory
Edge 3D - no such file or directory
Pattern Along Path - no such file or directory
Render barcode - no such file or directory
If I quit Inkscape, and then rename the directory back to without spaces, all work perfectly. Can you notice a pattern with the two that do work? Probably not important.