Nextcloud version : Nextcloud 18.0.3
Operating system and version:CentOS Linux release 8.1.1911
Apache or nginx version : nginx/1.17.9
PHP version :PHP 7.3.16
The issue you are facing:
I can’t use custom tags
Is this the first time you’ve seen this error? : N
Unfortunately I don’t understand what you want to tell us. Can you please provide a step-by-step description what you’re doing and what you’re expecting IN DETAIL.
You can usually pre-define tags under Settings > Administration > Basic Settings > Collaboratie tags or you enter them as required, e.g. for a file or folder.