Hi:
I get the following error when dealing with comments:
Bad Request!
The parameters of your request are invalid.
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Additional information about this error:
Illegal value received for parameter «c»!
When editing comments (Publish or Depreciate): the action happens but the error is thrown too.
-Perry
There's a thread with the exact error message in the title already.
Please see there. And maybe you can help find the root cause of this, e.g. provide your server, PHP, browser details.
http://forums.b2evolution.net//viewtopic.php?t=10605&highlight=illegal+value+received+parameter+%ABc%BB