Taxonomy disapear in editor side bar (error 500 in console) - wordpress

Question

On the editor of CPT, i have made custom taxonomy that worked before but now they didint appear on the right side bar.
Taxonomy is missing
Sometimes after reloading 10 times the custom taxonomy appear.
Taxonomy appear
I got some fatals errors in console :
Failed to load resource: the server responded with a status of 500
(Internal Server Error)
/wp-json/?_fields=description%2Cgmt_offset%2Chome%2Cname%2Csite_icon%2Csite_icon_url%2Csite_logo%2Ctimezone_string%2Curl&_locale=user:1
Failed to load resource: the server responded with a status of 500
(Internal Server Error)
/wp-json/wp/v2/templates?context=edit&post_type=speakers&per_page=100&_locale=user:1
Failed to load resource: the server responded with a status of 500
(Internal Server Error)
/wp-json/wp/v2/users?context=view&who=authors&per_page=50&_fields=id%2Cname&_locale=user:1
Failed to load resource: the server responded with a status of 500
(Internal Server Error) /wp-json/wp/v2/templates?_locale=user:1
Failed to load resource: the server responded with a status of 500
(Internal Server Error) /wp-json/wp/v2/speakers/1312?_locale=user:1
Failed to load resource: the server responded with a status of 500
(Internal Server Error)
When clicking on the link they show me :
{“code”:”rest_forbidden_context”,”message”:”D\u00e9sol\u00e9, vous
n\u2019avez pas l\u2019autorisation de modifier cet
article.”,”data”:{“status”:401}}
In my CPT and custom post type the show_in_rest is equal to true btw.
This is new, maybe with the maj of the wordpress version.
But i cannot find anything after 2 hours of research.
Someone have ideas ?
Thanks a lot
Code of my custom taxonomies