Follow the instructions here: It's likely your clock that needs to be resynced https://support.rocketleague.com/hc/en-us/articles/1260800770209-Why-do-I-Get-an-Error-When-Connecting-with-Epic-Online-Services-in-Rocket-League-
Follow the instructions here: It's likely your clock that needs to be resynced https://support.rocketleague.com/hc/en-us/articles/1260800770209-Why-do-I-Get-an-Error-When-Connecting-with-Epic-Online-Services-in-Rocket-League-