Is Payplan Compatible with PHP 7.1

Is Payplan Compatible with PHP 7.1? I recently tested my website by updating the PHP from version 5.6.31 to 7.1.8 and then my main menu stopped loading completely, Joomla menu links were not working properly and had other issues with SEF urls from modules. When I enabled the System Log, I noticed these errors keeps repeating:

Notice: Array to string conversion in /SITE/plugins/payplans/menuaccess/menuaccess/joomla/abstract/j35/menu.php on line 273

Notice: Undefined property: stdClass::$Array in /SITE/plugins/payplans/menuaccess/menuaccess/joomla/abstract/j35/menu.php on line 273

When I disable the `PayPlans-Menu Access` plugin, it works fine.

1. So is Payplan compatible with PHP 7?
2. Are the Payplan Apps and Plugins compatible with PHP 7 as well?

I am using:

Joomla 3.8.1
Payplan Version : 3.6 | Build :3
PayPlans-Menu Access 3.6.0

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