I've been using repository variables on pipe.sh to hide some credentials upon using the pipe. See the screenshot below:

I'm getting this error, although the variables are already declared under Repository Variables.

Repository Variables:

I've already tried some possible steps to solve it, through declaring it on Workspace variables and inside the Environment Variables. But I'm still having the same error.
I wonder what would be the reason of this error?
I hope this question make sense. Thanks for answering.