einstein_S5R1_4.24_windows_intelx86.pdb transfer fails - Error 403

It might help to (temporary) set the timezone of your computer to the other side of the world so that the BOINC client tries a different download server.

You can also try to download the file manually from our download directory and put it into the project directory.

Or see this thread for downloading it in a zip archive.

BM