Hi, sorry about the delay in my response.
* I tried to update WordPress to newest version 3.9.2. but that didn’t help. Now Edit Thumb -option shows instruction “Select the area for the thumbnail from the picture on the left.” but there’s nothing on the left. On the right side I can see the current thumbnail.
* HTML for the left side tries to load an image but instead gives a message: “Failed to load the given URL“. The image path is:
<img id=”imageToEdit” alt=”” src=”https://mysite.com/wp-content/plugins/nextcellent-gallery-nextgen-legacy/nggshow.php?pid=67&width=350&height=350″>
* I really wouldn’t like to disable all the other plugins since the website is already in use and some of the content is behind access control and uses HTTPS etc. etc.
* Console lists a lot of CSS errors and unknown properties like:
Error in parsing value for ‘transition’. Declaration dropped. load-styles.php:1
Unknown property ‘speak’. Declaration dropped. load-styles.php:2
Unknown pseudo-class or pseudo-element ‘-webkit-input-placeholder’. Ruleset ignored due to bad selector. load-styles.php:2
Unknown pseudo-class or pseudo-element ‘-ms-input-placeholder’. Ruleset ignored due to bad selector. load-styles.php:2
Error in parsing value for ‘min-width’. Declaration dropped. load-styles.php:2
Unknown property ‘speak’. Declaration dropped. load-styles.php:3
Unknown property ‘user-select’. Declaration dropped. load-styles.php:3
Expected ‘none’ or URL but found ‘alpha(‘. Error in parsing value for ‘filter’. Declaration dropped. load-styles.php:3
Error in parsing value for ‘transition’. Declaration dropped. load-styles.php:3
…
* And just one JavaScript error:
Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user’s experience. For more help https://xhr.spec.whatwg.org/ load-scripts.php:4
Can you figure out anything about those errors? If not, then I have to try to disable the plugins… Or try to accept that I cannot edit the thumbs.