Viber can not send pictures on iPhone because the device does not turn on location. If you turn off location, Viber returns error message that cannot send images or images pending.
To fix this problem if you are using iOS on an older version, please wait hard to wait for the new Viber update or you can upgrade to the latest version of the operating system to better support you.
After downloading the latest version, then do the following: Settings> Privacy> Location Services> Turn On is okay> Go back to Viber, you can access the photo store and send pictures.