Mobile App not Working for Business Account

Extremely frustrated with the Absa app on my phone that stopped working!! When visiting my branch to sort out the problem, I was told my Android phone needs to be updated for the app software (which is up to date) to work. However, I have a fairly new phone, and it is only the business account that encounters one error message after the other, preventing me from doing any transactions. Odd? Is there anybody else who is experiencing the same problem, and who could give advice please?