Update to version 2.37.2~ynh1 worked quite well.
The program is running but I needed to redo the configuration for my account (identities, signs and folders) end the update process gave me the sequent warning:
Info: Updating sources...
Info: Updating system_user...
Info: Updating install_dir...
Info: Updating permissions...
Info: Updating apt...
Info: Updating database...
Info: [+++.................] > Ensuring downward compatibility...
Info: [###+++..............] > Upgrading source files...
Warning: realpath: /var/cache/yunohost/app_tmp_work_dirs/app_lfgsx5si/patches/main: No such file or directory
Info: [######++++..........] > Updating configuration...
Warning: File /var/www/snappymail/app/data/_data_/_default_/configs/application.ini has been manually modified since the installation or last upgrade. So it has been duplicated in /var/cache/yunohost/appconfbackup//var/www/snappymail/app/data/_data_/_default_/configs/application.ini.backup.20240815.105829
Warning: --- /var/cache/yunohost/appconfbackup//var/www/snappymail/app/data/_data_/_default_/configs/application.ini.backup.20240815.105829 2024-08-12 10:13:29.512907322 +0200
Warning: +++ /var/www/snappymail/app/data/_data_/_default_/configs/application.ini 2024-08-15 10:58:29.545926203 +0200
Warning: @@ -20,6 +20,9 @@
Warning: ; Language used by default
Warning: language = "en"
Warning: +; Admin Panel interface language
Warning: +language_admin = "en"
Warning: +
Warning: ; Allow language selection on settings screen
Warning: allow_languages_on_settings = On
Warning: allow_additional_accounts = On
Warning: @@ -58,15 +61,12 @@
Warning: ; HIGH
Warning: mysql_ssl_ciphers = ""
Warning: -sqlite_global = Off
Warning: suggestions_limit = 20
Warning: [security]
Warning: custom_server_signature = "SnappyMail"
Warning: x_xss_protection_header = "1; mode=block"
Warning: -gnupg = On
Warning: openpgp = Off
Warning: -auto_verify_signatures = Off
Warning: ; Access settings
Warning: allow_admin_panel = On
Warning: @@ -75,6 +75,8 @@
Warning: admin_login = "admin"
Warning: admin_password = ""
Warning: admin_totp = ""
Warning: +admin_panel_host = ""
Warning: +admin_panel_key = "admin"
Warning: force_https = Off
Warning: hide_x_mailer_header = On
Warning: @@ -104,13 +106,8 @@
Warning: secfetch_allow = ""
Warning: [admin_panel]
Warning: -host = ""
Warning: -key = "admin"
Warning: allow_update = Off
Warning: -; Admin Panel interface language
Warning: -language = "en"
Warning: -
Warning: [ssl]
Warning: ; Require verification of SSL certificate used.
Warning: verify_certificate = On
Warning: @@ -134,6 +131,11 @@
Warning: disable_compression = On
Warning: [capa]
Warning: +contacts = On
Warning: +quota = On
Warning: +help = On
Warning: +search = On
Warning: +search_adv = On
Warning: ; Allow clear folder and delete messages without moving to trash
Warning: dangerous_actions = On
Warning: @@ -156,6 +158,7 @@
Warning: ; Like default_domain but then HTTP_HOST/SERVER_NAME without www.
Warning: determine_user_domain = Off
Warning: +login_lowercase = On
Warning: ; This option allows webmail to remember the logged in user
Warning: ; once they closed the browser window.
Warning: @@ -166,15 +169,12 @@
Warning: ; "Unused" - cannot be used
Warning: sign_me_auto = "DefaultOff"
Warning: -; When login fails, wait N seconds before responding
Warning: -fault_delay = 5
Warning: -
Warning: [plugins]
Warning: ; Enable plugin support
Warning: enable = On
Warning: ; Comma-separated list of enabled plugins
Warning: -enabled_list = ""
Warning: +enabled_list = "ldap-identities"
Warning: [defaults]
Warning: ; Editor mode used by default (Plain, Html)
Warning: @@ -183,29 +183,14 @@
Warning: ; layout: 0 - no preview, 1 - side preview, 2 - bottom preview
Warning: view_layout = 1
Warning: view_use_checkboxes = On
Warning: -
Warning: -; Show next message when (re)move current message
Warning: -view_show_next_message = On
Warning: autologout = 30
Warning: view_html = On
Warning: show_images = Off
Warning: -
Warning: -; View external images:
Warning: -; "ask" - always ask
Warning: -; "match" - whitelist or ask
Warning: -; "always" - show always
Warning: -view_images = "ask"
Warning: contacts_autosave = On
Warning: -mail_list_grouped = Off
Warning: mail_use_threads = Off
Warning: allow_draft_autosave = On
Warning: mail_reply_same_folder = Off
Warning: -; 1 - reply, 2 - reply all
Warning: -msg_default_action = 1
Warning: -collapse_blockquotes = On
Warning: -allow_spellcheck = Off
Warning: -
Warning: [logs]
Warning: ; Enable logging
Warning: enable = Off
Warning: @@ -266,7 +251,6 @@
Warning: ; Enable auth logging to syslog for fail2ban
Warning: auth_syslog = Off
Warning: -json_response_write_limit = 300
Warning: [debug]
Warning: ; Special option required for development purposes
Warning: @@ -286,6 +270,9 @@
Warning: ; Additional caching key. If changed, cache is purged
Warning: index = "v1"
Warning: +; Can be: files, APCU, memcache, redis (beta)
Warning: +fast_cache_driver = "files"
Warning: +
Warning: ; Additional caching key. If changed, fast cache is purged
Warning: fast_cache_index = "v1"
Warning: @@ -309,9 +296,16 @@
Warning: fetch_new_messages = On
Warning: [labs]
Warning: -; Allow drag & drop .eml files from system into messages list
Warning: +; Display message RFC 2822 date and time header, instead of the arrival internal date.
Warning: +date_from_headers = On
Warning: allow_message_append = Off
Warning: +
Warning: +; When login fails, wait N seconds before responding
Warning: +login_fault_delay = 5
Warning: +log_ajax_response_write_limit = 300
Warning: smtp_show_server_errors = Off
Warning: +sieve_auth_plain_initial = On
Warning: +sieve_allow_fileinto_inbox = Off
Warning: ; PHP mail() remove To and Subject headers
Warning: mail_func_clear_headers = On
Warning: @@ -321,9 +315,13 @@
Warning: folders_spec_limit = 50
Warning: curl_proxy = ""
Warning: curl_proxy_auth = ""
Warning: -custom_login_link = ""
Warning: -custom_logout_link = "https://cybervalley.org/yunohost/sso/?action=logout"
Warning: +custom_login_link=''
Warning: +custom_logout_link='https://cybervalley.org/yunohost/sso/?action=logout'
Warning: http_client_ip_check_proxy = Off
Warning: +fast_cache_memcache_host = "127.0.0.1"
Warning: +fast_cache_memcache_port = 11211
Warning: +fast_cache_redis_host = "127.0.0.1"
Warning: +fast_cache_redis_port = 6379
Warning: use_local_proxy_for_external_images = On
Warning: image_exif_auto_rotate = Off
Warning: cookie_default_path = ""
Warning: @@ -334,5 +332,5 @@
Warning: dev_password = ""
Warning: [version]
Warning: -current = "2.36.4"
Warning: -saved = "Mon, 12 Aug 2024 08:13:29 +0000"
Warning: \ No newline at end of file
Warning: +current = "2.28.1"
Warning: +saved = "Wed, 21 Jun 2023 06:38:05 +0000"
Info: [##########+++.......] > Applying SSO patch...
Info: [#############+++....] > Upgrading system configurations related to snappymail...
Info: [####################] > Upgrade of snappymail completed
Success! snappymail upgraded
Thanks a lot to the package manteiners!