Hey @mooooo, thank you for reaching out!

This feature is available on all paid plans and it requires “can edit” permission to the file.

Can you please confirm if you’re on a paid plan and if you’ve “can edit” access to the file?

You can find more information in our Help Center article: Add password protection to files and prototypes.

Thank you,

Gayani

Hi,

I as having the same issue. It turns out I opened the share settings from the Proprotype directly.
You actually have to go to the main file (design file) and click on the Share button from there.

I hope that helps some of you!

Hej, 
I also got the same struggle. Even by editing the share-settings directly in the main file as ​@Alexandre16 mentions, I’m send to the prototype-share-settings and there is no chance to change those and activate password protection.

Noticed this issue yesterday on Mac 15.3.1 (24D70) using the figma-app.

***Update: By selecting in main-file (layout) ‘Who has access: Only those invited’, you can now go to prototype-sharing-setting, change ‘Only invited people’ to ‘anyone’ and finally set a password.

Guess this workaround will be fixed the way it was working before soon.

Thank you, it works!)