It doesnt look like you were in a race, so not sure that comment was meant for you. Did it appear in the chat on the side of the screen? Everyone can see that.
Something that would help with this, and clean up chat in general, is if messages from any sort of group ride/race/workout were only seen by riders in that group.
Welcome @Jeroen_Suijker.
As new rider you probably see when you sign to event
A
B
C
D
This is correspond to the categories, and you shall select the categories according to your level.
You shall not joint event B or C if you are A rider.
Her you can find more information: Zwift How-to: Choose Your Cycling Race Category | Zwift
Enjoy your races.
Ride on