How to resolve UnicodeDecodeError in Certbot

If you are using Certbot and encounter an error like the following

UnicodeDecodeError: 'ascii' codec can't decode byte 0xe3 in position 12: ordinal not in range(128)

This may occur because the nginx configuration file (conf file) contains non-ASCII characters (e.g., Japanese).

To solve this problem, remove the Japanese characters in the nginx conf file or convert them to English. This will allow Certbot to work properly.