The given key was not present in the dictionary

[ErikT]

You open the Lansweeper web console, and you see an error “ The given key is not present in the Directory”

Now what? 

The error The given key was not present in the dictionary is rather generic and can have multiple causes.

• To ensure the issue is not caused by an incorrect, corrupt or missing website file, we recommend clearing the ASP.NET cache, which may already resolve the issue.
• Stop your webserver service. Your webserver service is either World Wide Web Publishing Service (IIS) or IIS Express.
• Empty the folders listed below.
  • C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files
  • C:\WINDOWS\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files

• Restart the webserver service
• Test the web console

Not fixed?

If the issue persists, there may be an issue with the page itself.  We would recommend reinstalling the web console.

[HoneyBadger]

If you see this error on the below page it indicates not all required files have been loaded yet. 

http(s)://<server/IP/FQDN>:<port>/helpdesk/default.aspx

This error usually goes away by itself after a (short) while. If it doesn't, restart your web service (IIS Express or WWW).