dumpbin is one of the utilities that ships with most Microsoft Compiler packages - we can probably get by without it. What we really needed to see was the message in the popup box that (we're assuming) you got.
All I can verify is that the trouchelle ppm package of Class-MOP (Class-MOP-0.66) works fine for me on build 824 -
found the same. Maybe build 822 is unsuitable, after all. (It's ok to install build 824 straight over the top of 822.)