Enter data in a field where filter="safehtml", i.e.
Open Login module, field pretext.
Save and close
The input is accepted and saved.
Error 0: Undefined class constant 'ONLY_BLOCK_DEFINED_TAGS'
| Status | New | ⇒ | Closed | 
| Closed_Date | 0000-00-00 00:00:00 | ⇒ | 2020-06-16 08:48:18 | 
| Closed_By | ⇒ | chmst | 
@SharkyKZ thank you
Run
composer install.