The problem appears when entering the checkout page
1 exception(s): Exception #0 (Exception): Notice: Undefined index:
number in
/var/www/../vendor/magento/module-checkout/Block/Checkout/AttributeMerger.php
on line 174Exception #0 (Exception): Notice: Undefined index: number in
/var/www/../vendor/magento/module-checkout/Block/Checkout/AttributeMerger.php
on line 174