Hi,
We're sorry about the trouble with Photoshop. Would you mind sharing the exact version of Photoshop you're using?
Pleae check out some of the suggestions mentioned in a similar conversation here: https://community.adobe.com/t5/photoshop-ecosystem-discussions/p-photoshop-top-menu-bar-is-missing-f...
If the issue persists, you can try to reset the preferences of Photoshop using the steps mentioned here: https://adobe.ly/2Qzc0K3
Please backup your settings prior to resetting the preferences. You can check: https://adobe.ly/2vNz6FG
Let us know how it goes!
Regards,
Nikunj