After upgrading to Archive Manager version 4.5, the error: "The 'webGrid_Initialize' for 'Initialize' should be a function, function name, or function text." is displayed when you first login to the website.
Part of the website may be cached by the browser.
If using Forms authentication, clear the browser cache, logout of the website, close the browser and re-open it.
If using Windows authentication, clear the browser cache, close the browser and re-open it.
If using Internet Explorer and clearing the cache does not resolve the issue, enable "In Private" browsing and open the website, then disable "In Private" browsing again.