Changes not saved in Module mod_image_show_gk4

Hello,

first, thank you for this beautiful template.

and we just install the quickstart package. We change parameters (image and title) in Module mod_image_show_gk4 (position header_bg), and changes are not saved....

But Joomla say : Message - Module successfully saved

We tried several times, but we still have this error.

Do you have a idea to fix this ?

Regard.

You don't see changes on front-end or also in back-end? Maybe your module is locked, please try this solution » How to unlock modules or articles in Joomla – GavickPro Documentation

If this will not help, please just try to create new module (copy of existing one) and check whether you can save it in this new instance.