Editing block with image after site migration breaks page

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Dear all,

I've encountered the following problem after migrating a 5.6.3.3 site and would be thankful for ideas towards fixing this problem. Everything else works perfectly.

Editing an image block or a content block with an image and then saving the edit yields an eternal loading icon. Refreshing then reveals a completely destroyed page: admin header bar gone, half of the site's content gone, red edit border, but none of them are clickable.

I have tried to replicate the former server, on which everything ran fine exactly. All configs are identical, apache2, php and mysql versions as well. Firefox shows no errors, js or other, php error log is empty as well.

Thank you in advance.

 
Porus replied on at Permalink Reply
Figured it out:
Concrete5's image helper crashes when generating thumbnails if php5-imagick is not installed on the host system.