Summary
By default, WebLink 9 is configured to return the absolute path during an internal redirect. In certain network and firewall configurations where WebLink and IIS are not running on the default port, WebLink may not display correctly.
Workaround
Manually modify Login.aspx.vb to change the redirect path and recompile the WebLink project.
Response.Redirect("~/CookieCheck.aspx?redirect=" & Server.UrlEncode(Request.Url.AbsoluteUri))
around line 395.Response.Redirect("~/CookieCheck.aspx?redirect=" & Server.UrlEncode(Request.Url.PathAndQuery))