1. Automatic Update to Version 2.6.3 +

Issue: Application update may fail due to leftover data from a previous version.

Solution:

Go to Settings > Apps > Juvo App

Select Storage

Tap Clear Cache and Clear Data

Re-open the APK

Authorize all permissions

Proceed with the automatic update

2. Error with Custom Rear Display

Issue: Secondary display not functioning correctly on Touch Dynamic devices.

Solution:

Go to Settings > About Phone

Tap Build Number 7 times to enable Developer Mode

Go to Settings > Developer Options

Enable 'Force Desktop Mode'

3. Declined Transaction – POSLINK Error

Error: SEND DATA RECV ACL ERROR

Verify IP address in POS

Ensure both devices are on same network

Confirm PAX terminal is powered on

4. PAX POSLink Communication Error

Issue: POS cannot communicate with payment terminal.

Restart POS and terminal

Verify IP address matches

Check TCP/HTTP configuration

Ensure stable network connection

Use static IP if possible

5. Additional Recommendations

Always document IP configurations

Use static IP addresses to avoid changes

Keep firmware updated on POS and terminal

Test connectivity after every reboot

Ensure proper cabling and Wi-Fi signal strength

6. Basic Troubleshooting Checklist

Restart all devices

Check power supply

Verify network cables or Wi-Fi

Confirm correct app version installed

Reinstall application if necessary

Check logs for error messages

1. Enable Developer Options: 

Go to Settings > About phone. 

Find the Build number and tap it seven times. You will see a message confirming you are now a developer. 

2. Enable "Force desktop mode": 

Go to Settings and find Developer options (it may be under System). 

Scroll down to find the Force desktop mode toggle and turn it on. Some devices may have a similar setting like "Enable desktop experience features".

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