4.27 Default Maps stopped working out of nowhere today

i have a project in 4.27 that i have been working on for the past week or two, and have had a main menu level that ive loaded in using the maps and modes default maps, however today i have only been able to play whatever level is loaded in the editor when hitting play or launch. the only way ive been able to do a workaround is opening the main menu with the game mode blueprint. troubleshooting has had me delete 2 folders in the project file directory, didnt work, had me update driver, nothing, tried the 4.27 chaos fresh install, same problem.
so i need to install an older version? i dont want to but if thats the only way to fix it is to restart a build in an older version i mean, if thats whats gotta happen ill do it, something seems very wrong though.
and i cant launch either now…