New 3D camera plugin!
You are likely using the free edition and did go beyond one of its limitations.
The number of events is one, having three layers in a layout is another, and so on.
You can find the complete list of limitations in this chart : construct.net/en/make-games/buy-construct-3/personal-plans
Construct 3 is fine, it is just behaving as it is supposed to.
Also, comments of a release are not the best place where to post such a message.