These errors are usually generated from an ad blocking plugin, such as Adblock Plus. To test this, either use a different browser or uninstall the ad blocking plugin by right clicking the extension by the URL bar and clicking "Remove from Chrome. There is also an easier way to temporarily disable an extension. In Chrome, opening an Incognito tab will usually stop extensions running however, unless you have specifically told Chrome which ones to run in Incognito is a requisite.