Hi ​@Loome – thanks for posting! How many emails have you sent this month? It is possible that you have already hit the 500 email limit for this month. 

A couple more questions: Was the flow working prior to switching to the free plan? Have you tried duplicating the existing flow and then manually making each email within the flow live? Additionally, what is the trigger on the flow? It is possible that you do not have enough contacts for the flow to work. 

Let me know the answers to these questions and we can keep trouble-shooting together!

Welcome to the community ​@Loome 

From what you’ve described, it doesn’t seem like you’ve exceed any limits.

I think you need to reactivate your account after you downgraded to free. and then turn the flows live again. More info on that process here: https://help.klaviyo.com/hc/en-us/articles/1260805595309

Let me and ​@rqcha know if that solves your issue.

Regards

Andy

Hi. Thanks for your reply :)

 I'm nowhere near sending 500 emails 

Yes, my flows were working fine until I changed the plan.
I haven't tried duplicating them, but should I really have to? Seem like a lot of work for something that should be very simple.

I have different flows. But one is my welcome flow, where the only trigger is that they sign up for the newsletter.

Arh, great. 

I just needed to reactive it But I couldn't find the button before. Thank you very much for your help.