I need a PHP/Javascript Developer to make a old plugin compatible for Wordpress

I recently bought a plugin from codecanyon called lastforms that works with Gravityforms ([login to view URL]), but the submit button of last version dosn´t work.

In the zip file attatched you will find two versions of this plugin:

- The older version of this plugin in the atatched file works!

- The lastform-v2.1.1.6 don´t work, but the lastform-v1.2.3 do. The submit button works but don´t have all the functionalities

- Network response when button is clicked: {"code":"wp_die","message":"Este link expirou.","data":{"status":403},"additional_errors":[]}

Should be compatnility issue with new gravity forms, new wordpress or php 7

I´m in a cloudways, php 7.1, last version of wordpress and Kleo theme.

CSS HTML JavaScript PHP Wordpress

ID Projek: #23534261

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