For me I cannot craft the elytra anymore. 👍
I did end up having a "long" login which to me always means that the realm was shut down and reloaded with the proper add-ons this time.
For some reason my Chuck loader still looks like Mumbo Jumbo though. I assumed that came over from another realm. 🤷♂️
I attatched the addon @Chris Hancocks mentioned if it helps in anyway.
I followed @kane's steps but simplified:
Navigate to C:\Windows\SysWOW64
Right click on d3dx11_42.dll and d3dx11_43.dll
Send to zip folder
once they are backed up delete them in the SysWOW64 folder.
RTX works again.