I do not understand why there is no known solution to this. I am experiencing the same isue as all the others who have been posting on this question and get the same error message. There should not have to be a new investigation every time it happens...
As I said I reset the app to factory default and updated it again. I have done this twice now. Does not help. I have a samsung tablet but it seems it is too old as the My Rogers app is not compatible. I am not aware if making any changes to my phone
I have been getting this message for about a week now. I can log in on the browser just not the app. I uninstalled to factory version on my Galaxy S7 and reupdated. Did not help. Very frustrating