Hello @kzu!
I know this project is super old, but it has been the only previewer which I have been able to effectively use with my solution. Fingers are crossed VS 2019 will be a better option.
Today I started receiving the following when attempting to connect to Forms Player
Error connecting to FormsPlayer: StatusCode: 403, ReasonPhrase: 'Site Disabled', Version: 1.1...
Hoping there is a way to get the site running again :)
Many thanks for your support!
Ant