I want to upgrade D 8.5.8 site to Drupal 8.6.14
Before doing it on live site I try to do it on a test site.
I created a test domain using PLESK, but this domain is accessible only from my local computer using the "host" script.
I did:
Configuration | Maintenance Mode | on
Configuration | Performance | no caches, Bandwidth optimization (off,off), Save Config, Clear all caches
Using Backup and Migrate module: backup the whole database
Using PhpMyAdmin: Import MySql file to the new database