Images disappeared after Update to WP 5.0.1

It is not as easy as planned. Updating from WordPress 4.9.8 to 5.0.1 made all my images disappear. In the HTML code received by the browser, the link is visible in the source view, so some attribute prevents it from displaying.

Just here I try to show a fresh photo:

Photo - where is it

I determined this plugin to be the one that suppressed the images:
Photonic Gallery & Lightbox for Flickr, SmugMug, Google Photos, Picasa, Zenfolio and Instagram. After deactivation of the plugin my photos were visible again.

Publishing from WP to FB

is not that easy…

Facebook changed the rules for automated publishing. Now publishing to the timeline is not possible anymore. Instead WP can publish to a page by means of Jetpack. But during configuration of the connection Jetpack shows an error message:

“This connection may not be working correctly”

I re-configured the Publicize connections in Jetpack multiple times. The error message re-appeared  after some time again. Then I removed the connection and set it up again. Still the same behavior. But after some minutes of further try and error the error message did not show up.

As a test in published this post and facebook showed it on by extra page. It is still not perfect, because the title of the post is omitted.

Paul