Hi,
With the help of the developer of Event Gallery Extended, I discovered that the extension no longer works completely because t4_bs5_blanc changes an attribute.
My problem is that for some time now no text is shown with the photos anymore.
If someone is viewing the gallery and clicks on a thumbnail, the photo will appear large.
In Google we have entered text under Description that was previously shown with the photo in Event Gallery.
That text no longer appears.
This was his answer:
"Your template is replacing data-title with data-bs-title. I checked this. It happens in plugins/system/t4/src/t4/T4.php:188"
I will send more information and credentials for you to check it in the next reply.