I'm using October CMS build 3.1.25. When trying to install the plugin I get the error:

Migrating Application and Plugins

In Yaml.php line 43:

A syntax error was detected in /var/www/html/plugins/vdomah/jwtauth/updates/version.yaml. The string "!!! Generate JWT Authentication Secret using php artisan jwt:generate and assign generated value to JWT_SECRET in .env" could no t be parsed as it uses an unsupported built-in tag at line 20 (near "!!! Generate JWT Authentication Secret using p hp artisan jwt:generate and assign generated value to JWT_SECRET in .env") at line 43 (near "/var/www/html/vendor/o ctober/rain/src/Parse/Yaml.php").

Any help would be greatly appreciated.

The problem was solved by removing the invalid characters in the yaml file, and then running the migration command.

I confirm, removing the "!!!" on 2 lines in the yaml file resolved the issue.