Support intro
Sorry to hear you’re facing problems 
help.nextcloud.com is for home/non-enterprise users. If you’re running a business, paid support can be accessed via portal.nextcloud.com where we can ensure your business keeps running smoothly.
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Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version (eg, 20.0.5): 24.0.3
Operating system and version (eg, Ubuntu 20.04): Ubuntu 20.04
Apache or nginx version (eg, Apache 2.4.25): Nginx 1.18.0
PHP version (eg, 7.4): 7.4.3
The issue you are facing:
When new users log in for the first time to Nextcloud (fresh LDAP account just set up in iRedMail/OpenLDAP), it spins for a while in the Login screen then just comes back to a blank login screen. Log in again and it goes right to the dashboard.
Is this the first time you’ve seen this error? (Y/N):
Been happening for a little bit. Cannot recall any specific changes other than upgrades.
Steps to replicate it:
- Create new user in OpenLDAP
- Login first time as new user
- Login screen has spinning circle and returns empty login screen.
- Login one more time as new user and it goes right to the dashboard.