FileRequired errorcheck PHP error > count() on noncountable object

[vizlot]

suggestion to make a simpler condition avoiding null variable

      if (!$found && !$sessionFiles[$this->formFieldName]) {
   		$checkFailed = $this->getCheckFailed();
       }

formhandler/Classes/Validator/ErrorCheck/FileRequired.php

Line 35 in 5c94109

if (!$found && count($sessionFiles[$this->formFieldName]) === 0) {

TYPO3 8.7
Core: Error handler (FE): PHP Warning: count(): Parameter must be an array or an object that implements Countable in /sites/gazvacancy/htdocs/typo3conf/ext/formhandler/Classes/Validator/ErrorCheck/FileRequired.php line 35