Steps to reproduce:

Precondition: PHP LDAP extension is installed

1. Open Users -> Authentication -> LDAP settings
2. Check the checkboxes "Enable LDAP authentication" and "Enable JIT provisioning"
3. Add some long value for "Provisioning interval", for example:
   Provisioning interval = 11111111111111111111111111111111111
4. Click update

Result:
Fatal error is displayed.
See screenshot:

Expected:
In case of invalid values, regular error message with description should be displayed.