required|max_length is not a valid rule.

Thanks. I'll look into it shortly.

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Can you try changing this line in system/Validation/Validation.php ?

https://github.com/codeigniter4/CodeIgni...n.php#L793

to this:

$nonEscapeBracket = '(?: (?<!\\\\)(?:\\\\\\\\)*[\[\]])';

Hi, sorry for the delay, it does not throw error, but does not pass the if. 

PHP Code:

$this->validate($this->validaViatico)