Need help - why are the runtime errors occuring? And how to make the friendly reminder pop's not working

What errors?
Which notifier message? you have many....

Hello Vidhan

  1. We can't see all of your Blocks, some are collapsed.
  2. We need to know exactly what the runtime errors say (screen capture on your phone)
  3. Is your App a Single Screen only?

By the way, Android waits for no one and you have several alerts in one block - if more than one is applicable at once, the User may not get to see the first. Better to use a Notifier that requires the User to tap 'OK'.