Devtool is empty when inspecting it - cannot use FindElementById

I am trying to automate web form data entry by using selenium VBA. We need to submit the forms on our organization SharePoint site, which requires us to log-in. I have already logged into the account. Please see the code below. Whenever I open the page (last step), there is a pop-up window asking me to enter the username and password again. I need to pass this step in order to get to the form that I want to enter all my information. I am not quite sure if this is an extra security that our IT team set up, but I could not inspect the page. I have included a screenshot here. I am hoping to inspect the pop-up window somehow so that I could use FindElementById. Thank you in advance for your reply.

obj.Start "chrome", ""
obj.Get "link"
obj.FindElementById("passwordInput").SendKeys ("password")
obj.FindElementById("submitButton").Submit
obj.FindElementById("idSIButton9").Submit
obj.FindElementByClass("reg-button").Click
obj.Wait ("1000")

obj.FindElementByXPath("//div[@id='slwp_ctl00_ctl41_g_f6ad5b95_2503_406f_ad81_eb5b3f59cad2']/div/div[3]/ul/li[10]/div/a").Click