Windows 10: MS Outlook 2016 - one Junk Email won't delete

Thanks in advance for your help.

I received a Junk Email today advertising flashlights for sale. I've moved the email to Deleted Items, but I cannot delete it. This error message pops up: "An error occurred in the underlying security system. An internal error occurred."

Windows 10 Pro
MS Outlook 2016
The Account type is Gmail POP/SMTP.

:)

 

Outlook 2016 Junk or Junk Email


I have tried Googling but so far no solution.
I just logged into my web client and it also shows 2 x Junk folders.

From @jimbos45 post, I should have only 'Junk Email' folder.

In my both Outlook 2016 and my web client, I can delete 'Junk Email' but not 'Junk' folder?

My account is Imap.

Can anyone suggest how I can rectify this?

 

Outlook 2016 Junk or Junk Email


Hello,
I just upgraded from Office 2007 to Office 2016.

I go into Outlook and find there are 2 junk folders > 'Junk' and 'Junk Email'

When I right click Junk Delete is grey out. When I right click Juck email delete is active.

Why do I have 2 Junk folders?

And which one do I need?

 

Outlook 2016 Junk or Junk Email


I have not used Outlook since 2010 but if I remember correctly, the default folders in Outlook have a JUNK folder and I think it was all in the same list with your email account folders. Try looking in Outlook settings for JUNK and or folder settings. Then see if you can set it to the IMAP JUNK folder or remove it in there.