You have arrived at this page either because you tried to open BoardPro with Internet Explorer 11 or you clicked in a BoardPro email.
To fix this:
You will need to change the "default browser" on your computer. It is quite simple to do:
Once you have that browser installed, set it as the default browser
Windows 10 - How to set your default browser:
Click on Start -> Settings -> Apps
Click on Default Apps, and then Web Browser (it's at the bottom)
Select your new browser.
Windows 7 or 8 - How to set your default browser:
Click on Start -> Control Panel
Click on Default Programs, and then Set your default programs
In the list find the browser (e.g. Chrome or Firefox) and set as default