Interference on my cell phone since I answered an unknown number = [PHONE]

I received a call from the number [PHONE], and when I answered, my phone cut off the call and True Caller started malfunctioning. Every time I tried to identify that number, the app failed with the message "True Caller has stopped unexpectedly." Be careful with this number. I have already blocked it, but it still doesn't let me find out who it belongs to.