Connect Add in stop working when sharing camera

When sharing the camera, the error message with connect add-in comes up and then the meeting is crashed.(used IE)

I've learnt that addin is only related to the function of sharing screen ,not camera.

Anyway it happened and I've tried many things like deleting and downloading the latest addin / Flash Player and using other browser as well.

Redownloading was not helpful on this matter.

Using Chrome seemed OK,  but after that, I knew other collegue still has the problem, who uses chrome.

Apparently both are not a real solution for this situation...Those ways are unstable.

Why is it happened?

Actually sharing webcam worked at the first few days, but suddenly the problem is taking place.

Please let me know if anybody know how I can handle this issue....

Thanks in advance.