Sorry but for better help on this, you should contact the dev of that repo/addon.
To be sure it works or not, copy the url in your browser. it could be as simple as a typo when you typed the source....or the repo/addon is dead.
one last question b4 i give up is what version of android do you have? i also have 0.1.1 android 6.0 and kodi 18.5 and i've just checked and all is working fine.
in fact the c**w repo updates at least once a week. oh and do other repos open?