Are you trying to get sketches INTO create or out of create ?
If it is into create simply make one into a ZIP file and post it here as an attachment.
That way we can try it ourselves and also examine it in case its something real easy.
meanwhile attaching a help file for import of sketches and libs in case there is anything in there that helps.
Let me finish writing my sketch using the desktop application. I will then try to compile it in the web IDE and if that still fails, I will post my sketch for you to examine.
In the meantime, let me leave with this observation. Several sketches once did compile and now don't even start compiling, while other sketches do compile. When compilation fails to start, there are NO messages in the black console window, only the "Compilation failed. Please report this issue on our forum" banner is displayed.