Go to your Chrome extensions page and enable developer mode in the top right corner. Find where your Autoview extension is on the page, and you will see a new link to the "background page", by clicking this a new window will open.
Once the background page is open, under the console tab you will see all of your warning and errors. The background page does not record anything until you have opened it. Once you close it, it will no longer record your errors or warning, however, do not fear as there is a little box near the top you can click to "preserve history". Once you've selected this option, you can then close your background page and come back to visit only when you want to see if you've received any errors or warnings.