Since Quixel is under UE now, I want to start using (not to mention it’s free) but their customer support is so bad couldn’t get my issue resolved. I can’t renew my acc, can’t subscribe, can’t get the assets free neither and can’t even pay if I want.
Can someone from UE dev look into it?
Well Adding Quixel to the mix, along with Twinmotion, is a new thing that will take time to integrate into the Unreal Launcher over time So far I was able to log into the Quixal main sight using my Epic ID and password and have been able to download the bridge and mixer apps, access the materiel catalogue, and export to Unreal 4 based on the engine version activated.
The usability experience on a scale of 10 is about a 4 at the moment and the support I would say is first adopter level with Epic even making statements that at the moment both are soft launches with plans after the 4.24 release being gold. Long way of saying give Epic time to sort things out as it seems that it is dung the soft launch Epic figures it out. 
■■■■ just saw this msg, well apparently it’s a huge bug that disabled my account to sign up with them, they kept saying they fixed it but failed, took a long while back and forth to finally rectify it.