When you access a page where an SDK from Dynamsoft has been implemented. You might get prompted to install the Dynamsoft Service.
The Dynamsoft Service is not installed or it's not started.
If the service is listed, please make sure it's started and running.
If the service is not listed, please download and install it.
Note: if you have confirmed that the service is installed and running on your machine but still get prompted with the install dialog, please refer to this article.