When you run the google snippets or google structured data testing tool, you could find some errors occur during the testing. It is a common error, and it is very easy to fix.
1. Error: Missing required field "updated".
a. To fix this, you can go to your template, and click on Edit HTML.
b. Look for these two words (timestamp-link or published)
c. Change the word published to updated.
This should take care of the problem above.
2. Error: Page contains property "blogid" which is not part of the schema.
Error: Page contains property "postid" which is not part of the schema.
a. The reason you got these two codes errors because the template has duplicated these two codes. So what you need to do is to look for the following codes and delete them off the template.
<meta expr:content='data:blog.blogId' itemprop='blogId'/>
<meta expr:content='data:post.id' itemprop='postId'/>
This should take care of the problem above.
I hope it was helpful to you.
