App crash and bugs!

Whats is this error ? How to solve this crash! Everything about crashes I see in the community is still crashing

use extenion are:
1.In app Pdf viewer
2.PDF Viewer

at (
at (
at$800 (
at$H.handleMessage (
at android.os.Handler.dispatchMessage (
at android.os.Looper.loop (
at (
at java.lang.reflect.Method.invoke (Native Method)
at java.lang.reflect.Method.invoke (
at$ (
at (
at Caused
at gnu.mapping.Location.get (
at io.kodular.medharanjan24.Lottery_sambad2.Screen1.lambda107 (Screen1.yail:557)
at io.kodular.medharanjan24.Lottery_sambad2.Screen1$frame.apply0 (Screen1.yail:11)
at gnu.expr.ModuleBody.applyN (
at gnu.expr.ModuleMethod.applyN (
at gnu.kawa.functions.ApplyToArgs.applyN (
at gnu.mapping.ProcedureN.apply1 (
at io.kodular.medharanjan24.Lottery_sambad2.Screen1.$define (Screen1.yail:10265)
at (SourceFile:503)
at (SourceFile:447)
at (SourceFile:377)
at (
at (
at (

Have a try :point_down:

Did you check all your About Screen Title’s?
It shouldn’t be blank on every Screen.

I have already followed it, it is also crashing!Thanks for reply

My all screen title is not blank! Thanks for reply

If you wish post here or pm me your aia to check it

If problem still now solved, you may post you aia(if you wish), as @dora_paz said.