Code suggestion menu is now white

For some reason, in the most recent version of IntelliJ IDEA, my code suggestions menu has turned white.

(The part to the right of package was manually redacted and is not part of the issue.)

Here is information pertaining to my version of IntelliJ IDEA and my device

IntelliJ IDEA 2021.1 (Ultimate Edition)
Build #IU-211.6693.111, built on April 6, 2021
macOS 10.15.7