Users of the Google Search Console may be getting messages regarding blocked resources in their Google Index. The messages may also contain a subscript stating that Rendering without this resource might impair the indexing of your web pages. These messages are no cause for alarm and may be ignored.
For the most part, the blocked resources that the messages are referring to are for things like external scripts, tracking programs and other functions that do not need to be indexed by Google.For example, a common one you will see often is pzz.events which is used by LinkPizza to track incoming visits to your website for statistical reporting. There is no reason for this script to be indexed by Google (otherwise it may skew your stats) so it is blocked. Furthermore, blocking this resource won’t have any effect on your indexing. The messages sent from the Search Console are merely a be aware notification.