You must choose a price tier in Pricing

Hi dear friends , I'm trying to upload a game to App Store but when I want to submit it, it give the error " You must choose a price tier in Pricing.", however when I want to choose the price menu stuck I mean it doesn't show me any price.
please help me with that.
Thanks
Confirm your process via ASC Help: https://help.apple.com/app-store-connect/en.lproj/static.html#dev9fc06e23d

I mean it doesn't show me any price.

...as ASC Help notes, you need to have accepted/agreed to paid contracts for anything but 'free'.

Also, be sure your role allows you do manage prices. See ASC Help for those details as well.

Good luck.