Hi @lyred_nd Welcome,
The reason you’re seeing above error is because you may not have email setup for your instance to send login to patient. Most likely you’re seeing that the patient is still created.
I’ve just finished some work in register here: Allow items exclude in Portal Profile by sjpadgett · Pull Request #3796 · openemr/openemr · GitHub
And will be releasing a pre patch for patch 4 sometime today if you’d be willing to test for us.
Here is a test prepatch 4 for you to test with if you want. Install like any normal released patch.