Container does not appear in experience manager

Hello everybody,

I am now in the process of creating a project and have created a new page and a container inside. But I can’t add components to the page because the container doesn’t appear in Expericne manager.
what should i do in that case? is there a tutorial or something? By the way, I tried the existing tutorials and unfortunately it didn’t work.

Thanks in advance
Best regards

Mo Abdalaziz