Bug add extension on null

[ChristopherDosin]

in one of our Shopware 6 shops we have two other plugins active in addition to your plugin.

That would be “shopping cart free products / goals | by 28minds” and “Award Items”. As soon as a free product or a bonus item (using these plugins) is placed in the shopping cart, your plugin will issue an error message. In the CartPageLoadedSubscriber.php file, in line 122 of the addLineItemPropertyGroups function, the $lineItem parameter is set to zero, which leads to an error. Would it be an option here to include an if statement that checks whether $lineItem !== is null?

[azngeek]

I had to uncomment this lines as it throws exceptions in combination with other extensions:

[Apatrid]

I solved this by adding one line checking if $lineItem is not null