@Dmitriy the GitHub page for setting up a local server has the following section:
Advanced local server setup
For more flexibility you can extend server with more options by creating server.properties file ..........
by the time Blynkers get down as far as this section many of them think I don’t need the “advanced” stuff and try to use their server.
There are some things in the advanced section that are optional like the setting up of the database but things like setting up email is not really optional i.e. the server is unusable if you can’t email the tokens to yourself. Perhaps we could move the essential stuff above the advanced section or just make it clearer what is optional and what’s not?