OP-Z app issues

Hello everyone
I am having issues with op-z app
In the configure page in the app
It saying it it’s syncing but never syncs and is frozen in the mode.
So now my OP-Z will make any sounds and is not responsive. The sequncer runs but nothing else
Has anyone else had to problem
help!!!
cw

* 1. List item

Have you tried reflashing the firmware?