Hi.
In my case, after updating to SU6, any project export finishes with the following error:
The filename remains the same but folders correspond to specific projects. If Thumbnail.jpg is generated manually then during the Export it is removed and the error appears again. All files are added correctly in the Marketplace category of the project and this is also the case with the products already published at the Marketplace.
Any hint on how to fix this would be appreciated.