I was confused by this error too. Here's what I found. This seemed to be caused by an old and apparently now invalid QA activity link.Example: Adding ?at_preview_token=[your token here...]Solution:1. Add ?at_preview_token= with no token value2. Clear cookies as this value is persistedThe above steps...

Hey there, Although the docs make it sound like you can use your own algorithm, you can't.By "custom algorithm" they mean custom criteria. They just mean that you can customize all of the OOTB options in the criteria menu to create your own criteria configuration. The closest thing that you can get ...