What version of certificate and Moodle are you using? We have a 100k limit to a file so I don't think you can attach a copy of the certificate and post it here.
Usually there could be several reasons for this kind of error.
- The Certificate version is not the correct one for the Moodle version.
- The Certificate module has been upgraded (compiled) incorrectly.
- The Certificate module needs to be reinstalled because it was corrupt.
- None of the above
Chardelle has posted a new thread for an updated version of Certificate for 1.9.9, This would be my recommended version right now. I have a thread where I tried to work through all the tweaks and changes to Certificate. This was done before Chardelle made her post.
Hope it is something simple. Please let us know if you figured out what happened, it will help someone later. Best- Chris