Sometimes, this bug occurs due to procedures in Prota system.
You can solve it by followings steps below.
1. Go back to Homescreen (using Sidebar)
2. Turn off and then on MicroBot Push app.
To turn off an app, tap/click and hold the app icon until the power off button appears. Tap the 'power off app' button. Once an app is turned off, it becomes grey. Repeat the same process to turn on the app.
If the problem persists, please contact our Support team at email@example.com