Your installation has no default phone region set. This is required to validate phone numbers in the profile settings without a country code. To allow numbers without a country code, please add “default_phone_region” with the respective ISO 3166-1 code of the region to your config file. For more details see the documentation.
電話番号の地域が設定されていないよというので、

config/config.phpに下記を追加
‘default_phone_region’ => ‘JP’,