Don't forget to use a spoiler tag when discussing solutions. (I have added the tag)

Same :(

Hello, yeah that is probably due to CW's admins removing katas that were copied from other sites to prevent copyright infringment and all that stuff.

THey have done it to a whole bunch of katas (since a lot were copied) there is a list on github if you are intreseted.

tho I feel sad since I never actually got to most of them and was gonna come back and solve them and now its not possible

You're just learning, no problem with that. ;)