You're using keil5, but is this the first error? If it's an output file, has it failed to build, and is there an error about that?
What is trying to open the file?
I'm not actually familiar with keil, I'm from a different part of Arm, but looks like there's a Getting Started guide on here: https://www2.keil.com/mdk5/docs - but I can't see any Chinese language docs, so might need to work out translation...
I'll see if I can find someone from the Keil team to see if they have any appropriate documentation.