Login and registration errors.

[MAD King]

The registration gives a 500 page with this error:

500
An error has occurred while processing your request.
If difficulties persist, please contact the website administrator and report the error below.

500 behavior::formvalidation not found.

It also give out this error after logging in and shows this URL my-account-alias/user?layout=edit

500
An error has occurred while processing your request.
If difficulties persist, please contact the website administrator and report the error below.

0 count(): Argument #1 ($value) must be of type Countable|array, null given

Joomla 4.4.3
VirtueMart 4.2.6 10972

[Alexb65]

Does it work with J SEF off?

[Nilsy]

Changing SEF doesn't help.
I am on J 5.1.1 and VirtueMart 4.2.14 11022

The problem for me (same issue), for an unregistered user, under the checkout procedure when adding the invoice address etc, that's when this goes to the dreaded blanc page with fault.