Store - View Plugin: 0xArt Advanced SEO

Hi folks, does anyone have an idea what the attached error message means and what can be done about it.?
We get this error every time we want to open the settings of this plugin in the admin area.!

In the file ow_core\ow.php after line 533 says "YearRange", add a new line "OA_". It is a new definition.
This plugin uses a class nomenclature that starts with OA_ instead of OW_ and in the latest versions of SkaDate and OxWall it is verified that they follow the norm. It doesn't matter, but I'm going to modify the plugin to make it compliant.
The result must be as in the image.
It is likely that the SMARTY library already detects the change and you don't need to turn 'DEBUG MODE' on and off.In the file ow_core\ow.php after line 533 says "YearRange", add a new line "OA_". It is a new definition.
This plugin uses a class nomenclature that starts with OA_ instead ...See more

The adjustment works perfectly, the error message is no longer displayed and the settings are therefore accessible.!

A new corrected version is now available
https://owspain.com/store/productview/870