Thanks for the response !
This is unfortunately not what is causing the problem. My Pictures do not contain any special characters or spaces.
RealEstateManager is loading all of my images with the image name with a weird sort of {} characters such as {4586DC0C-DFDE-48BA-9E78-6C1CBE7799A1} _3553_1239_70_70.jpg
The problem occurs on the website
www.solyespana.be, while I do not have this problem on the website
www.solyespana-rentals.com.
Solyespana-rentals.com is however an exact copy (or at least the files) from Solyespana.be.
Very strange, but I can not find the cause of this problem .... maybe it's in the database ?
Thanks for the help!
kind regards