Keeps saying Downloading Update (100%) and circle keeps spinning

I tried to add port UDP 16660 still no luck

Delete all sub folders in Voobly Mods and re-create the three sub folders. Then enter a game lobby and wait for ALL downloads to complete before clicking anything:
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I don't have any sub folders thats the issue

I don't have any sub folders thats the issue

You can try to create them manually:
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Network Connection Error [Error transferring http://www.voobly.com/gamemods/package/13/1.6 Map Pack/2/gamemod.vpkg - server replied: Forbidden]. Connection errors are typically caused by a temporary server outage, a firewall, or a problem with your internet connection. If it's been a long time since you've connected to Voobly it's recommended that you redownload the client from the website.

Network Connection Error [Error transferring http://www.voobly.com/gamemods/package/13/1.6 Map Pack/2/gamemod.vpkg - server replied: Forbidden]. Connection errors are typically caused by a temporary server outage, a firewall, or a problem with your internet connection. If it's been a long time since you've connected to Voobly it's recommended that you redownload the client from the website.

See attached

Attached 2 more issues

Did you create the folders and its sub-folders as described in the self-help article I linked above?

Yes I tried that as well creating the folders, but no files get downloaded into them

Please run the game diagnostic tool from the menu and paste us the results here. Thanks.

Non-DirectPlay game path is 'C:\Program Files (x86)\Microsoft Games\Age of Empires II'
Verifying 'C:\Program Files (x86)\Microsoft Games\Age of Empires II\language_x1.dll' exists...
Success!
Verifying 'C:\Program Files (x86)\Microsoft Games\Age of Empires II\age2_x1\age2_x1.exe' exists...
Success!
Voobly path is 'c:\program files (x86)\voobly'
Game version is '1.0C'
Verifying 'C:\Program Files (x86)\Microsoft Games\Age of Empires II\language_x1_p1.dll' exists...
Success!
Checking DirectPlay libraries...
Looking for dpwsockx.dll...
Looking for dplayx.dll...
'c:\windows\system32\dplayx.dll' size: 226816 bytes
DirectPlay Init Success!
Scanning installed DirectPlay games...
Age of Empires II
Age of Empires II - The Conquerors Expansion [found]
Game was found in DirectPlay registry!
DirectPlay play thinks the game is installed at 'C:\Program Files (x86)\Microsoft Games\Age of Empires II'
DirectPlay command line is 'Lobby'
DirectPlay play thinks the game exe is at 'C:\Program Files (x86)\Microsoft Games\Age of Empires II\Age2_X1\age2_x1.exe'
Verifying file exists... Success!
DirectPlay play thinks the language dll is at 'C:\Program Files (x86)\Microsoft Games\Age of Empires II\language_x1.dll'
Verifying file exists... Success!
Scanning 'c:\program files (x86)\voobly\gamedata\AOC\age2_x1.exe'
Success!

Everything looks fine. DirectPlay is configured and the game was found on your harddrive. If you still have problems try rejoining the lobby or restarting your computer.

Try performing a clean installation of the Voobly client:
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Did you guys figure out what it was, i am getting the same issue?