After searching for a solution of my problem, I found another YUNOHOST user with same problem and without a solution, see How to clean a messed up LDAP config
Trying repairing the broken state with yunohost cli always end with:
Error: error during LDAP search operation with: base=‘ou=domains,dc=yunohost,dc=org’, filter=‘virtualdomain=*’, attrs=[‘virtualdomain’] and exception {‘desc’: ‘No such object’, ‘matched’: ‘dc=yunohost,dc=org’}