Hi! Thank you for your replies. In fact I already deleted the whole repository from both my HDD and my Github Account, reforked it and pulled the Roll20-repository as well as my fork several times. Well, as I said, now I can clone the repository, because there is no longer a colon in the folder name. But there are still colons in the file names of the CSS and HTML file: As long as there is no strange caching problem within my browser you can verify this by clicking here. I think the reason why there is no copy of the CSS and the HTML file in my local repository, no matter how many times I clone it, is the fact that there are still colons in their file names. But I'm willing to correct myself if I am the only one with this problem (but, to be honest, then I really have no clue why this error occurs). Eclipse says this if I want to commit something: Greetings!