PiPass v1.3 is an important update as it brings support for automatic update checking. Due to the nature of this update, all other versions have been deprecated and their version tags have been removed, making them no longer installable.
Here's how you update from a deprecated version:
cd <webroot>
sudo rm -r blockpage && sudo rm index.php config.php
cd ~ && wget https://apps.roen.us/pipass/getuser && mv getuser getuser.php && wget https://apps.roen.us/pipass/setup && mv setup setup.php
sudo php setup.php
sudo nano <webroot>/config.php
- Done!