The following
No valid security key found. Please use at least the following shortcode:
[advanced_iframe securitykey="<your security key - see settings>"]
Please also check in the html mode that your shortcode does only contain normal spaces and not a &nbsp; instead. It is also possible that you use wrong quotes like “ or ”. Only " is valid!
attributes are unknown or cannot be read properly. Please fix or remove this attributes. You can disable this message in the administration on the "Introduction" tab:
  • Id "width="1024"height="960"" is not valid. Please check the documentation.
  • width="1024"height="960"