Hi,
Hosting reckons there are no server/resource issues. They suggested it is a caching or DNS issue since the user is actually created in the database.??
I have tried de-activating all plugins updated in the last month but it made no difference. Have activated again now.
Query monitor shows no useful script errors – only the missing heart-beat but I turned that off. I have a wp-core slow query.
Tried de-activating userswp plugin too but it made no difference also when I used the GD registration form.
It times out with a 524 error. Login usually gives 524 error too.
CloudFlare and MalCare firewalls are turned off.
Seems everything else on the site works ok.