I changed the default password on the K2. After that, the app is crashing every time I try to go to settings. I have uninstaled and reinstaled the app several times, and of course I used the new password on the wifi. I have also tried with a second phone, but the same problem keeps happening. I use a Note 9 and the problem appered after I changed the password on the K2. Now it is impossible to get into the settings, so I cant do anything about the problem.
I never changed the password, so I can't tell if this is "normal". But to get back access you can try to push the reset switch to get back to system defaults. If that does not help, re-flash the firmware, as this will also reset to default values.