Crashes whenever attempting to go into settings

[A-R-M]

Specifications:

Name: Acer Iconia One 10 B3-A20
Form factor: Tablet
Android Version: 5.1 ‘Lollipop’
Kernel Version: 3.10.72
RAM: 1 GiB

Pushjet Version: 1.4

After installing Pushjet from the Google Play Store, when first opening it, Pushjet immediately crashed (received the message “Unfortunately, Pushjet has stopped.”). After reopening it, Pushjet didn’t immediately crash, but will always crash whenever I tap on the Settings gear icon on the top-right corner of Pushjet. Tapping the Subscriptions icon next to it, however, does not cause a crash.