Chord rules

[Nextom]

Chordrules.jpg

I want to change my chord-progression with the Chord-Suggestions-tool.
Before that, I defined the Chord Rules in the Master Track.
Now I'm trying to change the third chord. But when I click on the right-arrow, it says "No rule found. Please check the rules."
Please explain, what I am supposed to do here.

[musicdevelopments]

I see. It means that Isus2 is not found as a possible chord after I and it is not set up as a source chord. I just checked the Pop Major Scale Rules and yes, Isus2 is missing.
Feel free to add it to the rules. You can extend the rules depending on your needs.