I have no idea what this means

Migrations are pending. To resolve this issue, run: bin/rake db:migrate
RAILS_ENV=development

Extracted source (around line #392):
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  def check_pending!(connection = Base.connection)
    raise ActiveRecord::PendingMigrationError if

ActiveRecord::Migrator.needs_migration?(connection)
end

  def load_schema_if_pending!

I’m doing the one month rails course if that helps. I tried running what
it said to run. Still have the same issue.

Try typing in your console “rake db:migrate”.