Update issue on Ubuntu 20.04

It seems I can’t find how to update my citra nightly to the latest build. how can i update it? please help? i am new

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.

Did you install with flatpak?

yes. i mean i can update it using flatpak. but i can’t find auto-update options or something.