New page in menu

hi
I duplicated your page “our services”, named it “solutions” and hung the menu point below pages > beautiful and published it.

But as a result, the whole menu appeares no more, and when checking in the menu section (under appearance) at the bottom, the menu settings did not have the theme locations ticked anymore. I would not be able to add them again, until I removed the new page “solutions” from the “menu”.

Am I doing something wrong?
Best regards, charles