Resolve Missing updated in blogger.

 When you look your structured data page in your webmaster tool
  you  found some item withe error which is connected with your
  page like  missing updated, author etc, these error takes place when  Google could  not find these items on your blog or blog post.

If you want to fix these problems you have to fallow some steps which is quit complex you have to edit your template HTML .

Resolve Missing  “updated” Error

Here we resolve the problem of missing updated error this error occur in your webmaster tool when Google could not find updated time on your blog or blog post.
Go to your blogger dashboard
Blogger > Template > Edit HTML > and search for the following code in template edit HTML section :-
                                                         

<data:post.timestamp/>

When you found above code replace it with given below:-

<span class='updated'><data:post.timestamp/></span>

After replacing, Save your blogger Template.


Resolve Author Error

The problem of Author error take place in your webmaster tool when Google could not find Author name on your blog or blog post.
Go to your blogger dashboard
Blogger > Template > Edit HTML > and search for the following code in template edit HTML section :-

<span class='post-author vcard' > 

                <b:if cond='data:top.showAuthor'> 

                  <b:if cond='data:post.authorProfileUrl'> 

                    <span class='fn'> 

                      <a expr:href='data:post.authorProfileUrl' rel='author' title='author profile'> 

                        <data:post.author/> 

                      </a> 

                    </span> 

                  <b:else/> 

                    <span class='fn'><data:post.author/></span> 

                  </b:if> 

                </b:if> 

              </span>

When you found above code replace it with given below:-

<span class='post-author vcard' itemscope='itemscope'  itemtype='http://schema.org/Person'> 
                <b:if cond='data:top.showAuthor'> 
                  <b:if cond='data:post.authorProfileUrl'> 
                    <span class='fn author'> 
                      <a expr:href='data:post.authorProfileUrl' rel='author' title='author profile'> 
                        <span itemprop='name'><data:post.author/></span> 
                      </a> 
                    </span> 
                  <b:else/> 
                    <span class='fn author'><span itemprop='name'><data:post.author/></span></span> 
                  </b:if> 
                </b:if> 
              </span>

After replacing, Save your blogger Template.

Now go to Structured Data Testing Tool   and enter the URL of your blog and check your status .