rest_validate_value_from_schema was called incorrectly

[Daniela]

i am using ultimate block on my website and got this output on a page when using them. what could be the problem?

Notice: rest_validate_value_from_schema was called incorrectly. The schema keyword “type” for can only be one of the built-in types: array, object, string, number, integer, boolean and null. More information: Debugging in WordPress (this message was added in version 5.5.0.) in /var/www/wp-includes/functions.php on line 5225

[Alexis]

Hi @mkf ! Can you share a link to a page where the notice comes up? And which blocks from the plugin are you using when the message appeared?