during normal operation error "method_id is missing" occurs (see picture). In addition "Event not found (event)" message occurs in the top right area of the page.

It happens only inside IE (even in compatibilty mode). Works fine with Chrome and FireFox.

Did someone experienced that?

Well, I'm aware some people say the only reason to use IE is to download other browser(s) :-). But in this case they treat IE seriously :-(

Click image for larger version. 

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Regards, Dariusz