My camera keeps abruptly shutting down

I've been using this camera since mid 2015 and have been using it once in a while throughout the years. In 2021, when I wanted to take graduation pics, the camera abruptly turns off as I'm taking a group photo and I felt embarrassed having to explain that my camera has a problem. I've tried turning on and off multiple times but the camera will turn on for a while then shuts down.

Some people have suggested that it may be the lens problem. But when I took it out, the camera still shuts down on its own.

I've also changed to a fully charged battery but still no results.

it's only when I'm in the settings or update software menu then the camera stays on.

What could be the problem?