Pagebuild error - "The user was not found in the JWT token, nor in the current virtual context URL."

Getting the error "The user was not found in the JWT token, nor in the current virtual context URL." from the iframe within pagebuilder. Saw a couple other threads on here with the same problem but not contained the solution that actually worked for me. What worked for me was:

going to the Settings app in Kentico, expanding the Versioning & Synchronization section, going to the Web farm section, and changing Web farm mode from Disabled to Automatic, then running iisreset.exe