Image upload into the module not working

Hello,
just bought the extension but the image upload is not working. The green upload bar appears and gets stuck at the end. No images appear. No images were upload into the specified folder.

Please help.

Hi.
Thank you for using our product,
Please give me link your site and your account of the administrator via mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
I will check it for you

Hi,

I sent the login data via email.

Regards
Antje