Updated to Nebula and all of my gmail inbox emails have disappeared. All of the other folders are intact.

I just updated to Nebula and all of my inbox emails (from gmail) have disappeared. All of the other folders are intact, including the sent folder. I also have another email account in this client (my work email) and these are also fine. It's only affected my gmail inbox messages. I'm using this email for job applications currently so would really appreciate help figuring out how I recover my emails. Thank you!