Try the steps below to trouble shoot and should fix the issue .

Step 1. Power Cycle the device and log back in to the Payanywhere device .

Step 2.

Force Stop

1. Open the device Settings (gear icon).
2. Find and tap on Apps.
3. Locate and tap on the Payanywhere app.
4. Tap Force Stop, then tap Ok.
5. Tap Clear Data and tap Ok. (This will not erase any of your Payanywhere data!)
6. Reboot the terminal and log in to the Payanywhere app.