Just ran into this and thought i would pass this little nugget of knowledge along in case it happens to you.
Scenario:
You are in GPMC and one of your GPO's throws an error when you try to run a settings report.
"An error occurred while generating report:
An unknown error occurred while the HTML report was being created."
Cause:
Seems to be something with importing IE security settings.
Solution:
Edit install.ins inside: {GUID of Policy}\user\MICROSOFT\IEAK
[Security Imports]
ImportSecZones=1
Set it back to "0"
RoadKi11
"This apparent fear reaction is typical, rather than try to solve technical problems technically, policy solutions are often chosen." - Fred Cohen
Scenario:
You are in GPMC and one of your GPO's throws an error when you try to run a settings report.
"An error occurred while generating report:
An unknown error occurred while the HTML report was being created."
Cause:
Seems to be something with importing IE security settings.
Solution:
Edit install.ins inside: {GUID of Policy}\user\MICROSOFT\IEAK
[Security Imports]
ImportSecZones=1
Set it back to "0"
RoadKi11
"This apparent fear reaction is typical, rather than try to solve technical problems technically, policy solutions are often chosen." - Fred Cohen