Unresponsive permissions screen

Hello.

I've just installed Locus Maps Pro 3.27.1 on my Blackview BV6000s running Nougat. I've enabled all the permissions needed for the app to run, but when I try to run through the apps setup sequence I accept the terms and conditions no issue but when I try to progress past the permissions screen the app is unresponsive.

If the permission have already been allowed the continue button does nothing when I press it. The button responds as if the app is acknowledging I'm pressing it, but it does nothing. If the permission are not granted and I press continue I am prompted to give permissions (which I do) but them I am returned to the situation where I have granted permissions but the continue button does nothing.

I have set an external SD card as my internal storage. I've tried resetting my device with no joy. I had the same issue with Locus Maps Free.