Core doesn't update with Composer
So after we ran regular update (current version was 8.6.10), our website crashed. We followed this fix to recover from WSOD https://www.drupal.org/project/drupal/issues/3039408#comment-13018093

After website was restored we tried running all kinds of composer commands to update (like mentioned in question) and it would just spit out "Nothing to install or update".

Solution:


remove "twig/twig": "1.37.1", from composer.json
Run again composer update drupal/core webflo/drupal-core-require-dev --with-dependencies


Updating twig/twig (v1.37.1 =&gt; v1.38.2): Loading from cache
Updating drupal/core (8.6.10 =&gt; 8.6.13): Downloading (100%)

So, not sure what's going on.