Custom Module is not outputting correct values in frontend

[Betz Developer]

Hello community, 

I'm trying to create a custom module, which creates a new text field in the product's edit-page and then get that information on the frontend.

This is my current state: https://github.com/sebastian-marinescu/pconconfiguratorurl
I initially forked: https://github.com/PululuK/democustomfields17

I managed to add a custom-field to the products-form and also successfully save it to the DB.

Now my problem is, that I get nothing in the frontend. Dumping the object:

{$product.pconconfiguratorurl|@var_dump}

always results in empty values:

array(3) { ["id"]=> NULL ["id_product"]=> NULL ["pconconfiguratorurl_field"]=> NULL }

I'm stuck. I suspect the problem to be somewhere in the getInstanceByProductId-function. 
Does anyone have an idea on how to further investigate this, or directly solve it?

[Betz Developer]

I fixed it with the help of the community-dev PululuK: 

        'multilang' => true,
        'multilang_shop' => true,

These were true, and setting them to false fixed it immediately.