Citra emulator grey and flash screen problem

I need your help please. It’s about time i’m playing pokemon sun and pokemon ultra sun nowadays, but the issue is caused by the citra. First, it appeared grey screen when i played, but it solved. I set the graphics of citra configuration, then i was untick ‘enable hardware shader’. After that, i had the second issue. It was kind of flash screen. I don’t know how i should do next

In order for us to provide better support, we need to see the log generated by Citra. This guide will walk you through how you can obtain the log file: How to Upload the Log File.

What is that related to my problem? I don’t understand

A log will provide more information about your Citra settings and hardware(CPU & GPU), we need one in order to help you.

Can you help me please? I’ll give you my remote ID via teamviewer or anydesk

Are the steps in the bot’s link not sufficient? What do we need to change to make them clearer?