If you are experiencing a black or white screen as shown below, here's what you can try to fix the issue:
Go to "Settings" >>
"Apps" >>
"UpBeing" >>
"Storage and Cache" >>
Tap "Clear Storage"
Re-open the UpBeing app on your device and log in
If the above steps don't work, please don't hesitate to contact UpBeing's support team for further assistance or report a bug by clicking here.