To use the ViewClix App on an iPhone or iPad, you'll need to grant access to "All Photos." Only granting access to "Selected Photos" is not supported at this time. 

Below is step by step instructions to allow the ViewClix app access to "All Photos"

1. Open "Settings" (the settings app on your phone, not ViewClix settings)
2. Select "Privacy"
3. Select "Photos"
4. Select the ViewClix App
5. Allow "Allow Photos"

*Note: These instructions are of iOS 14 & iOS 15