Just wanted to follow up here as spotted that @sndbeats also reached out to our Support Team about this who were able to help them to fix the issue with their ClickFunnels to AWeber workflow.
It seems that in the Update Subscriber AWeber step the Subscriber field contained the email address as a custom value, rather than the ID number, from the Find or Create Subscriber AWeber search step. Once that field was changed to use the subscriber’s ID number it worked correctly.
For anyone that’s running into similar issues when selecting custom values from search step, I’d recommend checking out this help guide for more details: Add custom values to dropdown menu fields in Zaps
And if you’re still having trouble after reviewing that guide, please contact our Support Team via the Get Help form and they’ll be happy to assist further! :)