Error: browser login fails when clicking a ribbon button

Error: browser login fails when clicking a ribbon button


When clicking a button in the KitConnect ribbon for the first time after starting Revit, the browser pops open to authenticate the user. However, instead of a login screen, the user sees something similar to the following (the error may look different, depending on your browser):


There are three likely causes:
  1. Your computer has no internet connection - an internet connection is required for KitConnect to work properly.
  2. Another application is using port 3006, which KitConnect uses to authenticate.  It's been found that Windows 10's own Hyper-V application occasionally uses this port, but it could be another application as well.
  3. A firewall on your network is blocking the connection.

Solution - Cause #2

If you are certain that your internet connection is stable, then follow these steps to see if port 3006 is being used by another service:
  1. Type cmd in the start menu search bar
  2. Right-click the "Command Prompt" application and select Run as Administrator
  3. Type (or copy/paste) the following command:
    netsh int ipv4 show excludedportrange protocol=tcp
  4. If any of the ranges that appear include 3006, then continue to the next step.  If not, then there's something else going on - please contact KitConnect support.
  5. Disable Hyper-V - from the same Command Prompt, copy and paste the following
    dism.exe /Online /Disable-Feature:Microsoft-Hyper-V
  6. Restart your computer
  7. After restart, reserve the port so Hyper-V doesn't try and take it it back.  Re-open the command prompt as in Step 2, and paste the following:
    netsh int ipv4 add excludedportrange protocol=tcp startport=3006 numberofports=1 store=persistent
  8. Re-enable Hyper-V - from the same command Prompt, copy and paste the following
    dism.exe /Online /Enable-Feature:Microsoft-Hyper-V
  9. After restart happens, this issue should be fixed permanently.

Solution - Cause #3

Ask your IT Administrator to whitelist the following URLs in your firewall:
  1. *
  2. *

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