Howdy, I'm a neophyte publisher trying to format a epub file using Sigil. After validating with flight crew, I'm advised I have this error on line 8 of almost every page. I don't know anything about writing code. Not sure what this means or what to fix. Here's the error message and the code. Any help or direction would be appreciated.
Error says: missing required attribute 'content'
Existing Code says: <meta name="Adept.resource" />