Un an après, j’ai eu le même problème, j’ai trouvé la solution ici
Notamment la réponse suivante :
However for it to work I had to change the single quotation mark after the new password to a double quotation mark. The default auth-realm-string was “BaikalDAV”. So for future reference: php -r 'echo md5("admin:BaikalDAV:your_new_password");'
I also lastly admin password for Bail within Yunohost.
can someone help me to recover, was able to do the trick above, but no clue in which folder I can find the config file to modify
Then replace the last line of /var/www/baikal/Specific/config.php with the new hash, same in /var/www/baikal/config/baikal.yaml and change the ynh config using yunohost app setting baikal password_hash -v your_new_hash