I have posted a new test version 0.0.6.
This adds a log page to the Configure app in the Apps section of Homey. If you have issues then go to that screen and enable the logging. Then repeat the troublesome task, e.g. pairing, and when finished return to the log screen to view the diagnostics message. If you could send then to me by PM or create an issue on GitHub (link is in the app store by clicking on Report an issue) then I can try to improve the app.
To copy the log on Android you can long press on the log text until the menu pops up and then touch ‘Select All’ followed by ‘Copy’. After that you can paste the text into the target view.
I have also added extra error traps to the ONVIF library so hopefully the previous crashes will not happen.