Can you tell me how you installed the eZ Flow extension on top of eZ Publish? I just tried to replicate this by moving some blocks in a clean eZ Flow install but was able to publish the changes without error.
Maybe it's the combination of eZ Publish and Flow, so if you can let me know how you installed that I might be able to look into that.
Thanks and regards, Robin
Board member, eZ Publish Community Project Board - Member of the share.ez.no team - Key values: Openness and Innovation.
Thanks for your instant reply and excuse me for my late answer! We've installed eZ Flow extension in the standard way, nothing specific. Now it is working correctly again and no more problems with blocks drag and drop are reported. I didn't modify anything related to that extension, but I assume that the first time I posted my topic the problem with blocks was caused by my network connection or my browser. I will write again if I run upon that problem during my work.