The reason you cannot post pictures/videos might be that you have not granted GETTR access to your local photo album. Please take the following steps to grant access:
iOS:
- Go to Settings
- Scroll down to find GETTR among your apps
- Choose Photos
- Grant access to “All Photos”
- Open the GETTR App and upload your photos/videos
Android:
- Go to Settings
- Tap Apps
- Select GETTR on your device
- Select Permissions in App info
- Allow access to Storage and Camera
- Open the GETTR App and upload your photos/videos