mac mail always opens blank

I open an email and it is blank, then when I try to close it, it won't close. Sometimes if I click all over the blank window it loads, but mostly not. It usually doesn't do it all the time but this past week it has started doing it all the time on every email.

I have an imac and os catalina 10.15.7

Another thing too, it keeps saying i have an update even though I have automatically keep my mac up to date. If I click on update it says checking for updates and just spins. It won't stop spinning until I close it.

thank you.