PHP Error on form submit with redirect action

Hi,

We use Ninja Forms 3.1.8. We have a form with many mail/actions that works well. When we add a redirect action and then try to submit the form, we have the following error :

The server encountered an error during processing.

Uncaught Error: Class 'NF_ESO_Parser' not found in /path/to/website/wp-content/plugins/ninja-forms/includes/Libraries/EOS/Parser.php:151
Stack trace:
#0 /path/to/website/wp-content/plugins/ninja-forms/includes/Libraries/EOS/Parser.php(377): NF_EOS_Parser->checkInfix(NULL)
#1 /path/to/website/wp-content/plugins/ninja-forms/includes/Libraries/EOS/Parser.php(357): NF_EOS_Parser->solveIF(NULL, NULL)
#2 /path/to/website/wp-content/plugins/ninja-forms/includes/MergeTags/Calcs.php(31): NF_EOS_Parser->solve('')
#3 /path/to/website/wp-content/plugins/ninja-forms/includes/AJAX/Controllers/Submission.php(234): NF_MergeTags_Calcs->set_merge_tags('', '', '2', ',', ' ')
#4 /path/to/website/wp-content/plugins/ninja-forms/includes/AJAX/Controllers/Submission.php(60): NF_AJAX_Controllers_Submission->process()
#5 /path/to/website/wp-includes/class-wp-hook.php(298): NF_AJAX_Controllers_Submission->submit('')
#6 /path/to/website/

I guess it’s just a typo in the Parser class code. We’ll try to fix it directly in the plugin, but it would be nice if you could fix it for future releases 🙂

Thank you very much and thank you for this great plugin 🙂

Mathieu.