Hi I have a similar problem, but I can uninstall the app from the play store.
It keeps asking for the 4 to 6 digit pin which, it says pin recovery not set and please set the recovery phone number in settings. I can't get into settings without the pin. I just started having this problem recently, before I could access the app without it asking for a pin.
I tried to connect it to an avast account, but I can't figure out how to do that on the site, it keeps redirecting me to download avast to my computer.
I uninstalled and re installed, no help there. I am almost positive that I did install anti theft on my mobile phone, but when I reinstalled it immediately asks for a pin so I can't get into anything to review what is there. Is there any way to fix this?