Hi @tayeb_rashed,
I’ve shared a suggestion:
If you’ve installed ERPNext in version 15, make sure the payment is also in version 15 to prevent errors.
If the payment is in the development branch, switch to it:
bench switch-to-branch version-15 payments
If you’ve uninstalled or installed the app, do this:
bench get-app --branch version-15 payments
This is because the payments app has a version 15 branch.
I hope this is clear and helpful.
Thank You!