CrisC wrote:yes, that's clear to me - but my question was more: why is it then possible to create / allow those inputs :)
But it is NOT allowed from input:
If you have SPACES in your folder names, it means they were not created by X3.
_Underscores ARE allowed because they are perfectly valid, also in URL's /url_with_underscore/. So even though X3 does TRY to support url's with spaces by converting to underscores, you will break if you have both underscore and empty spaces in your url's. So, just avoid empty spaces, as this is not even allowed from the X3 panel.