product_listing_details error v1.12.3

[wouwouwou]

A part of the api call addFixedPriceItem went since the new version from:

\n\t"product_listing_details": "",

To:

\n\t"product_listing_details": " \n \n",

The eBay API now returns an error with code 37 where it states that this information is invalid.

I've searched a bit in the module and think that EbayRequest.php contains an error with this, but I unfortunately am not able to find the exact issue.

Greetings, wouwouwou