hi @Exmerald_0 ,
I’ve been searching online and reviewing the official Epic Games documentation, and I found that this error can have several causes related to content access permissions.
First of all, try restarting the Epic Games application. Sometimes the error is resolved simply by closing and reopening the launcher, as there can be temporary issues with content downloading.
That said, even if you are the creator of the island, it’s possible that the content is set to private or only accessible to team members. In that case, if your account is not properly linked to the project or the team managing it, the system won’t allow you to download the files required to join the session. That’s why the message “failed to download required content before joining the session” appears ,it actually means you’re not authorized to access that content.
The most direct solution is to check that the account you’re using to join is added to the correct Team in the Creator Portal. Once your account is part of the team assigned to the project, the system should allow you to download the content and join without issues.
Here is the official documentation that explains this in more detail:
I also found a similar post where the error message shows up as: “Matchmaking Error 2: You are unable to play this game at this time
Hope it helps!