Can’t add post or page title

Unfortunately I haven’t found a solution on the net for several hours and hope someone here can help me out.

I’m trying to add a post title to a new post, but it doesn’t work. When I edit the post with elementor and then come back, the title is automatically set to “elementor #some number (i.e elementor #752)”
But before editing the post with elementor, I want to add a post title.
When I try to click on “add title”, nothing happens, see screenshot below.

I really hope someone can help me out.


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