Fix a WordPress Plugin

In a few months my hosting partner will move all WordPress installation to PHP 7.2. Unfortunately one of my used plugins generates an error when run with PHP 7.2 Plugin: TABBER TABS (unfortunately not updated since a few years!) Error message is: Warning: Use of undefined constant TABBER_TABS_DIR - assumed 'TABBER_TABS_DIR' (this will throw an Error in a future version of PHP) in /home/xeccbike/public_html/testing/wp-content/plugins/tabber-tabs-widget/[login to view URL] on line 31 30: / Set constant path to the plugin directory. 31: define( TABBER_TABS_DIR, plugins_url('tabber-tabs-widget/')); 32: 33: // Load Language 34: load_plugin_textdomain('tabber-tabs-widget', false, TABBER_TABS_DIR . 'language'); I have set up a test installation of my website running on PHP 7.2 under [login to view URL] where you can see the error message. What I'm looking for: Someone who either fixes the existing plugin or who installs a new plugin that will look and behave the same way as the old plugin. Development has to be done on the Testing server, afterwards the developments have to be moved to the Live server. I can provide you access to the FTP server, mySQL DB and of course to the Backend of WordPress on the Testing Server. I run a very small bike shop... I'm looking for a low cost solution... time is not crucial.