Drupal 8.x

I try to save the translation in a content that I have created and the content type is customized, it is called programs but it shows an error:

I am using drupal 8.5

Hi, Looking for Drupal, PHP developer for government job in the Washington DC area. On-site at the start, then telework later. They want face-to-face. They are looking for 2 developers for a long contract. It will be myself and someone else. If you know anyone with experience in Drupal 8 and PHP programming. Please contact me. It's a migration job,  Simple non-complex sites they said.

I have a site with Drupal 8 and the Flag module.

I would like to display a text when the user has the association role and when it is flagged with the following flag (his machine name):

flag_request_association_role

Then put its 2 conditions in a single line and how to know if the user is flagged ?

  {% if 'association' not in user.getroles and ??? %}
     <p>my text</p>
  {% endif %}

My current Drupal version is 8.9.6  , updated from 8.6.x using "composer update".   PHP version is 7.4.3

I tried to upgrade to Drupal 9 used this https://www.drupal.org/docs/upgrading-drupal/upgrading-from-drupal-8-to-... as guide.

When i came to composer update I got into trouble.  

Maybe someone has answer how to fix my upgrade issue ?

Hello !

I have a problem with my upgrade to Drupal 8 :
Nearly all the modules I use are either ported or now in the core, but not Page Manager (apparently still used in Drupal 8 or 9 but not advised by Drupal's security policy).
https://www.drupal.org/project/page_manager

I have always used it for all my Drupal projects.

How can I manage to replace it ?