In order for the Mega Drop Down Administration Add In to operate correctly, it needs to be trusted on the site where installed.

The installation program will attempt to automatically apply this trust, but an Administrator may need to "re-trust" the Add In after it has been deployed to your site. This procedure only needs to be performed after the initial installation.

You will need to "re-trust" the Add In If the Mega Drop Down Administration Add In opens and appears empty as displayed in the following image:

Using the SharePoint New Experience Interface

1. Open the site where you deployed the Mega Drop Down Administration Add In.
2. Open the settings menu by clicking the Gear from the top menu
3. Select Site Contents menu item
   
   
   
   
4. Select the ellipsis (...) to open the context menu
5. Select Manage Permissions:
   
   
   
   
6. From the Permissions page, click the link to re-trust the application:
   
   
   
   

Using the SharePoint Classic Experience Interface

1. Open the site where you deployed the Mega Drop Down Administration Add In.
2. Open the settings menu by clicking the Gear from the top menu
3. Select Site Contents menu item
   
   
   
   
4. Select the ellipsis (...) to open the context menu
5. Select Manage Permissions
   
   
   
   
6. From the Permissions page, click the link to re-trust the application