Remove out message <success> tag in function acoUpdate in class AclExtras.
As when $this->Flash->render() in view it shows the message with tag like below
<success>Aco Update Complete</success>
Same for
<error>Plugin {0} not found or not activated.</error>
Please do not use any tag in the message
Remove out message
<success>tag in function acoUpdate in class AclExtras.As when $this->Flash->render() in view it shows the message with tag like below
<success>Aco Update Complete</success>Same for
<error>Plugin {0} not found or not activated.</error>Please do not use any tag in the message