Thread:Extension talk:Bootstrap/Bootstrap in Vector Skin/reply (4)

Ok, the problem is, that the Bootstrap styles are loaded by a call to load.php. Since on these calls no actual HTML pages are served, skins are not needed and thus skin files not loaded. This means, the call to  will not be executed and the LESS compiler will just compile an empty file.

Solution: Put that call to  where it will be executed, e.g. LocalSettings.php.