Hi Bill,
I got this error with every CODAP file, no matter the language nor the file while trying to do a screencapture of a graph (but also when trying to access other tools).
The error console says:
sent to log server: {“activity”:”Unknown”,”application”:”CODAP”,”session”:”180422105653-050680″,”time”:1524405529019,”event”:”error”,”event_value”:”{\”message\”: \”Exception: SecurityError: Failed to read the ‘rules’ property from ‘CSSStyleSheet’: Cannot access rules\”}”,”parameters”:{“message”:”Exception: SecurityError: Failed to read the ‘rules’ property from ‘CSSStyleSheet’: Cannot access rules”}}
Apparently, the error also occurs in Firefox but while this browser tries it as a warning, Chrome stops the execution. At least this is what I’ve read in other forums about this same error in different webtools.
Following this link you will see a very technical (but clear) possible explanation for this error in Chrome in Stackoverflow forums.
Hope this helps.
Kind regards,
Cristián