Hi @eking607,
Can you provide us with an export of your form so we can check your settings and test it further on our end?
You can go to Forminator > Forms panel, click on Gear icon next to your form and export it from there.
Upload the export file to any file sharing service like GDrive or DropBox and share the download link here so we can check it out.
Cheers,
Predrag
Hello there @eking607
I tested the Single Membership on a clean site (no other plugins, default theme, sandbox Stripe) and it seems that worked well. Form submission as well the Stripe payment went through.
This might point to a conflict with theme or another plugin, so you will have to perform a conflict test around it.
How to:
First, create a recent backup in case you lose any settings during the test and have to restore to a previous working state.
Then deactivate all plugins apart from Forminator, activate a default theme like Twenty TwentyOne, clear all caches, and check again if the issue is still there. If not, it means that something is conflicting, so start activating the remaining plugins and theme, one by one this time, checking every time for the reported issue, until you reproduce the issue, thus finding the conflicted combination. The following flowchart image can assist you during this test: https://premium.wpmudev.org/wp-content/uploads/2015/09/Support-Process-Support-Process.gif
If this is a live website with traffic, I’d rather advise to create a staging environment, meaning a complete and exact copy of this installation into another location/folder in the same server, using a separate database, and perform the test in there instead without worrying about the live site.
Looking forward to your results,
Dimitris