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Unable to Contact License Server

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I recently bought a license and I can't activate it

When I try to activate it, 2 messages pop up:
(1)"Unable to contact license server. Check your proxy settings or contact your system administrator for help."
(2)"Installation_token Not Found"

"Do you get the same result more than once if you follow the same steps? Y/N" - Yes.

I've added screenshots of the messages.

I've tried the link that I've seen around these forums - https://keystone.mwbsys.com and it wont load it properly and say - 

This site can’t be reached

keystone.mwbsys.com refused to connect.



Check your internet connection.

Check any cables and reboot any routers, modems, or other network devices you may be using.

Allow Opera to access the network in your firewall or antivirus settings.

If it is already listed as a program allowed to access the network, try removing it from the list and adding it again.

If you use a proxy server…

Check your proxy settings or contact your network administrator to make sure the proxy server is working. If you don't believe you should be using a proxy server: Go to the Main menu > Settings > Change proxy settings… > LAN Settings and deselect "Use a proxy server for your LAN".

And when I try it from my mobile phone it says "OK".

I've tried disabling my firewall (Windows firewall) completely and it didn't work either.

I've tried opening a hotspot from my mobile phone and connecting to the link I mentioned above through that connection and it still didn't work.

When I tried going to the link https://keystone.mwbsys.com while using the built-in vpn in my Opera browser (set to optimal location - I checked the location and it was SWEDEN) It actually showed the "OK" message.

I'm on OS  WIN10-64, My current browser is Opera GX

Thanks alot in advance, S.

2020-02-21 00_52_20-Window.png

2020-02-21 00_52_25-Window.png


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  • Solution
52 minutes ago, SeloTapeTM said:

Thanks alot in advance, S.

I see what the problem is.  The following entries must be removed from your HOSTS file:



Hosts File Blocks

Host data: keystone.mwbsys.com


Instructions on resetting your HOSTS file can be found in this Microsoft support article.

Please let us know if the issue is resolved or not.

Edited by Porthos
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  • 1 month later...
On 2/21/2020 at 1:55 AM, Porthos said:

I see what the problem is.  The following entries must be removed from your HOSTS file:

Instructions on resetting your HOSTS file can be found in this Microsoft support article.

Please let us know if the issue is resolved or not.

Hey there, I kinda forgot about making this thread because the answer you gave me to this problem fixed it! So thank you a lot! have a great day!

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