Q:

Error occured with Blob Cache in

I am getting the following error in Event viewer, after enabling Blob Cache : 
An error occured in the blob cache.  The exception message was 'The system cannot find the file specified. (Exception from HRESULT: 0x80070002)'.

A:

Reset the cache by going to Site settings -> Site collection Object cache -> Reset object cache.
Make sure to select "Force all servers to flush their object cache", this will regenerate the cache on the next visit to the page.

