Simple update of content gives error (Version Comments/ publish changes) window with some timestamp string.

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Hello,

Made a simple site with version 8.5.2, almost ready but now it gives me an error after publiching any content.
The green window on the right gives a nice 'Update Block
The block has been saved successfully.'
But after hitting the blue publish button an Error window popsup with some time related schedule. after hitting the publish changes button a stinrg fills the browserwindow ({"time":"2019-11-18 20:11:43","message":null,"title":null,"redirectURL": ect). See images attached.
Hope anyone has any clue where I have to find a way around this error.

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vincedelaking
 
vincedelaking replied on at Permalink Reply
vincedelaking
Really no one has had this happend lately, and found a sollution?