Thank you for your reply. I’ve found an issue. When I directly right - click to download the log on the web page, the downloaded file isn’t complete. This can be seen from the comparison of file sizes.
fulllog.txt (2.8 MB)
Now I’m uploading my complete log. From this complete log, you can see many errors like the ones in the picture. From the log, it can be seen that sometimes after this kind of error occurs, there is a pause for a period of time, then it runs for a while, and then the error occurs again. After that, a “firmware restart” shows up.