I'm afraid so. Aditi is a testing grid after all so things aren't quite as stable as the main grid.
The usual solution: Patience.
If you're in a hurry and don't need to test LI or physics shape, you can log on to another grid instead. I use my own private grid in those cases but there are several public grids with free mesh uploads too.
Aditi "Failed to upload - Internal Server Error"
in Second Life Server
Posted