Hi Jocaramore, its still working indeed, but I have previously shared my exact method here.. Request failed due to failure of previous request: Connecting 2 reddit with HTTP “Make an OAuth 2.0 request”? - #5 by LeftyLuke
Im not sure how to help, did you run the set variable module to get the base64 string? That is what made it work for me, and that is the exact method im still using today.
Its important to set up your app here: Reddit - The heart of the internet and get the client id / secret from there, those are the 2 things I would check again if all is correct
ALso check the reply here: How to create a connection to Reddit Using the “Make an OAuth 2.0 request”? - #2 by LeftyLuke