TYPO3 Core

• create a content element with an image tab ('text and image' or 'image' for example)
• add an image through the image tab
• click on link browser button in order to create a link on the image

The link browser url :

Request URL: http://www.xxxx.local/typo3/wizard/link/browse?token=xxxx&P[table]=sys_file_reference...

is called two times - have a look at attached file.

This lead to two "modal-backdrop" div and then you can do nothing more because there is a gray background overlapping the popup - have a look at attached file.

<div class="modal-backdrop fade show"></div>
<div class="modal-backdrop fade show" style="z-index: 1010;"></div>