1. The first thing you can try is deactivating all your 3rd party plugins. There may be a compatibility issue between the plugin and one of your 3rd party plugins. You can activate the plugins one by one to find the problematic one.

2. Activate any other theme and try again. The plugin may not be compatible with your theme.

3. Make sure that you are using the latest version of the plugin (you can find the update history at the bottom of the item description page)

4. Read the help documentation well. As many support related questions can be answered simply by re-reading the documentation; https://themes.thememasters.club/plugin-docs/dvfaq/index.html

5. If you still unable to fix the problem, you can request a refund; https://themeforest.net/refund_requests/new