add and change product image

Hi guys,
In admin of www.gpmusic.nl it is not possible anymore to add or change the product image. Using OpenCart 2.1.0.2
Have a look at the attached images.
What could be the cause?

Kind regards,
Edze de Boer

edzedeboer wrote: ↑

Thu May 30, 2019 11:47 pm

.. it is not possible anymore to add or change the product image ..

Would do you mean with that?
Does the popup not opens, is there any error message (see OpenCart log and / or server log)?
Have you changed the php-version (which one are you using)?
Running any additional extensions (VQMod or OCMod)?

A bit more infos would be good.