If Kami is automatically logging you in with a different Google account than the one you use with Kami, you will need to sign out, then sign in again with your correct email address.
A possible scenario is that you are viewing a pdf that has been annotated by you, but from a different Google account. You will still see your initials when you hover over the annotation (in this case highlighted text), but will not be able to change the annotation.
To adjust the original annotation, click the profile button in the top right, and then select Logout.
From here, you will be automatically forwarded to the Kami sign-in page. If this does not happen automatically, simply go to kami.app or click on your extension to log in with the correct school account.
If your school uses Google accounts, choose the "Continue with Google" option.
If your school uses Microsoft accounts, choose the "Continue with Microsoft" option.
If you sign in with Google, you will be directed to a page showing all the email addresses used on this computer in the last 30 days. Select your school email from the listed accounts.