I'm receiving an error that the Link Checker fails to validate some URLs because of illegal character and that character always seems to be the space character (ASCII: 32). However other similar links have no problem being validate as I can see at etc/linkchecker.html. Please have a look at the errors below.
Thank you very much for your suggestions. The links are actually to assets that have space in their names, but the folders don't. It has left from being copied to a text file first and then pasted here. The correct error would be: