Yes, you can certainly install the WordPress plugin on a development server.
Our software is not locked to a specific domain and we encourage our users to deploy their sites to a development box before launching to ensure proper functionality. However, it is essential to ensure that your development server is similar to your production server. It is recommended to have the same version of PHP and the same packages installed on both, such as the SOAP Client Class. This will make sure that any potential issues are caught early on and can be resolved before going live.
As a professional in the industry, we understand the importance of testing and development, and appreciate your efforts to ensure your site’s optimal performance.