I'm using a fresh new plone 5.0.4 installation.
I've created some folders and pages without problem.
I'm trying to put an image in the body of a page using the "image" button in Tinymce.
If I upload the image via "image selection popup" of Tiny it's all ok, but nothing happens when I say to Tinymce to use an image already present in the site. I can browse, via Tiny popup window, the images stored in the site but when I click nothing happens.
In the "inspector tool" of the browser there aren't errors or warnings.