There are some known loading issues with Active Query Builder, the 3rd party plugin that is used as the Lansweeper report builder. Most of these issues were resolved in the latest public release though, which you're already running. Some things you can look at are:
- Make sure at least .NET 4.5 is installed on the machine hosting your web console
- Try reinstalling .NET (4.5+)
- If you're running Windows Server 2008, the issue may persist, we're still looking into this but you can resolve the issue by migrating to a newer operating system
If the issue does persist, I recommend mailing into support via support@lansweeper.com, include the following log files:
- Program Files (x86)\Lansweeper\Service\Errorlog.txt, as present on your Lansweeper server.
- Program Files (x86)\Lansweeper\Website\App_Data\web_errorlog.txt
