I’m having the same issue. I’ll update you all if I’m able to figure it out in my table. Thanks!
Here’s a link to a similar issue: Gmail::SendEmail error - Failed to fetch data from external service - #11 by BenLee
I figured out my issue! I am using a filter to find the email address associated with a name located in another table. I forgot to link the names in both tables to a lookup table list with only names. I hope this helps others! I can give more clarifying details if this doesn’t really make sense. 