No errors have been found.

Enabled:
 - activity: 2.18.0
 - admin_audit: 1.16.0
 - audioplayer: 3.3.1
 - bruteforcesettings: 2.6.0
 - calendar: 4.3.1
 - cloud_federation_api: 1.9.0
 - comments: 1.16.0
 - contacts: 5.2.0
 - contactsinteraction: 1.7.0
 - dashboard: 7.6.0
 - dav: 1.25.0
 - deck: 1.9.0
 - emlviewer: 1.0.7
 - external: 5.1.0
 - federatedfilesharing: 1.16.0
 - federation: 1.16.0
 - files: 1.21.1
 - files_downloadactivity: 1.16.0
 - files_external: 1.18.0
 - files_pdfviewer: 2.7.0
 - files_rightclick: 1.5.0
 - files_sharing: 1.18.0
 - files_trashbin: 1.16.0
 - files_versions: 1.19.1
 - firstrunwizard: 2.15.0
 - forms: 3.2.0
 - health: 1.6.1
 - integration_openproject: 2.3.1
 - issuetemplate: 0.7.0
 - logreader: 2.11.0
 - lookup_server_connector: 1.14.0
 - mail: 3.0.2
 - maps: 1.0.2
 - nextcloud_announcements: 1.15.0
 - notifications: 2.14.0
 - oauth2: 1.14.0
 - onlyoffice: 7.1.2
 - password_policy: 1.16.0
 - photos: 2.2.0
 - polls: 4.1.8
 - privacy: 1.10.0
 - provisioning_api: 1.16.0
 - recommendations: 1.5.0
 - registration: 2.1.0
 - related_resources: 1.1.0-alpha1
 - serverinfo: 1.16.0
 - settings: 1.8.0
 - sharebymail: 1.16.0
 - support: 1.9.0
 - survey_client: 1.14.0
 - systemtags: 1.16.0
 - tasks: 0.14.5
 - text: 3.7.2
 - theming: 2.1.1
 - twofactor_backupcodes: 1.15.0
 - updatenotification: 1.16.0
 - user_status: 1.6.0
 - viewer: 1.10.0
 - weather: 1.7.7
 - weather_status: 1.6.0
 - workflowengine: 2.8.0
Disabled:
 - circles: 26.0.0 (installed 0.18.9)
 - dicomviewer: 1.2.4 (installed 1.2.4)
 - drawio: 2.1.0 (installed 2.1.0)
 - drop_account: 2.1.0 (installed 2.1.0)
 - encryption: 2.14.0 (installed 2.6.0)
 - files_automatedtagging: 1.16.1 (installed 1.16.1)
 - files_external_gdrive: 0.4.0 (installed 0.4.0)
 - files_mindmap: 0.0.27 (installed 0.0.27)
 - files_texteditor: 2.15.0 (installed 2.15.0)
 - gpxmotion: 0.1.0 (installed 0.1.0)
 - gpxpod: 5.0.6 (installed 5.0.6)
 - jitsi: 0.16.2 (installed 0.16.2)
 - metadata: 0.18.0 (installed 0.18.0)
 - ojsxc: 5.0.0 (installed 5.0.0)
 - onlyoffice-2: 2.1.2
 - scanner: 0.2.3 (installed 0.2.3)
 - spreed: 16.0.2 (installed 16.0.2)
 - suspicious_login: 4.4.0
 - twofactor_totp: 8.0.0-alpha.0
 - user_ldap: 1.16.0
 - wopi: 3.5.11 (installed 3.5.11)

{
 "system": {
 "instanceid": "***REMOVED SENSITIVE VALUE***",
 "passwordsalt": "***REMOVED SENSITIVE VALUE***",
 "secret": "***REMOVED SENSITIVE VALUE***",
 "trusted_domains": [
 "nextcloud.tennis24.ee"
 ],
 "datadirectory": "***REMOVED SENSITIVE VALUE***",
 "dbtype": "mysql",
 "version": "26.0.0.11",
 "overwrite.cli.url": "https:\/\/nextcloud.tennis24.ee",
 "dbname": "***REMOVED SENSITIVE VALUE***",
 "dbhost": "***REMOVED SENSITIVE VALUE***",
 "dbport": "",
 "dbtableprefix": "oc_",
 "dbuser": "***REMOVED SENSITIVE VALUE***",
 "dbpassword": "***REMOVED SENSITIVE VALUE***",
 "installed": true,
 "maintenance": false,
 "theme": "",
 "loglevel": 0,
 "app_install_overwrite": [
 "onlyoffice",
 "dashboard",
 "files_external_gdrive",
 "dicomviewer",
 "calendar",
 "emlviewer",
 "mindmap_app",
 "weather",
 "issuetemplate",
 "health"
 ],
 "tempdirectory": "\/projektid\/nextcloud\/data",
 "overwriteprotocol": "https",
 "mysql.utf8mb4": true,
 "memcache.local": "\\OC\\Memcache\\APCu",
 "has_rebuilt_cache": true,
 "mail_from_address": "***REMOVED SENSITIVE VALUE***",
 "mail_smtpmode": "smtp",
 "mail_sendmailmode": "smtp",
 "mail_domain": "***REMOVED SENSITIVE VALUE***",
 "mail_smtpauthtype": "LOGIN",
 "mail_smtpauth": 1,
 "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
 "mail_smtpport": "587",
 "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
 "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
 "mail_smtpsecure": "tls",
 "default_phone_region": "EE",
 "allow_local_remote_servers": true
 }
}

[Thu Mar 30 20:05:48.042118 2023] [authz_core:debug] [pid 518039] mod_authz_core.c(817): [client 127.0.0.1:46906] AH01626: authorization result of <RequireAny>: granted

{"reqId":"R4cvkOaocYFig91Xranp","level":3,"time":"2023-03-30T17:21:54+00:00","remoteAddr":"127.0.0.1","user":"peacecop-kalmer","app":"index","method":"GET","url":"/index.php/apps/weather/","message":"Class \"OCP\\AppFramework\\Db\\Mapper\" not found","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36","version":"26.0.0.11","exception":{"Exception":"Error","Message":"Class \"OCP\\AppFramework\\Db\\Mapper\" not found","Code":0,"Trace":[{"file":"/projektid/nextcloud/lib/autoloader.php","line":177,"function":"require_once"},{"file":"/projektid/nextcloud/apps/weather/lib/AppInfo/Application.php","line":52,"function":"load","class":"OC\\Autoloader","type":"->"},{"file":"/projektid/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php","line":171,"function":"OCA\\Weather\\AppInfo\\{closure}","class":"OCA\\Weather\\AppInfo\\Application","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/projektid/nextcloud/3rdparty/pimple/pimple/src/Pimple/Container.php","line":122,"function":"OC\\AppFramework\\Utility\\{closure}","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/projektid/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php","line":138,"function":"offsetGet","class":"Pimple\\Container","type":"->"},{"file":"/projektid/nextcloud/lib/private/AppFramework/DependencyInjection/DIContainer.php","line":487,"function":"query","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->"},{"file":"/projektid/nextcloud/lib/private/AppFramework/DependencyInjection/DIContainer.php","line":465,"function":"queryNoFallback","class":"OC\\AppFramework\\DependencyInjection\\DIContainer","type":"->"},{"file":"/projektid/nextcloud/apps/weather/lib/AppInfo/Application.php","line":68,"function":"query","class":"OC\\AppFramework\\DependencyInjection\\DIContainer","type":"->"},{"file":"/projektid/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php","line":171,"function":"OCA\\Weather\\AppInfo\\{closure}","class":"OCA\\Weather\\AppInfo\\Application","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/projektid/nextcloud/3rdparty/pimple/pimple/src/Pimple/Container.php","line":122,"function":"OC\\AppFramework\\Utility\\{closure}","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/projektid/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php","line":138,"function":"offsetGet","class":"Pimple\\Container","type":"->"},{"file":"/projektid/nextcloud/lib/private/AppFramework/DependencyInjection/DIContainer.php","line":487,"function":"query","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->"},{"file":"/projektid/nextcloud/lib/private/AppFramework/DependencyInjection/DIContainer.php","line":465,"function":"queryNoFallback","class":"OC\\AppFramework\\DependencyInjection\\DIContainer","type":"->"},{"file":"/projektid/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php","line":65,"function":"query","class":"OC\\AppFramework\\DependencyInjection\\DIContainer","type":"->"},{"file":"/projektid/nextcloud/lib/private/AppFramework/App.php","line":148,"function":"get","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->"},{"file":"/projektid/nextcloud/lib/private/Route/Router.php","line":315,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/projektid/nextcloud/lib/base.php","line":1055,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/projektid/nextcloud/index.php","line":36,"function":"handleRequest","class":"OC","type":"::"}],"File":"/projektid/nextcloud/apps/weather/db/citymapper.php","Line":19,"CustomMessage":"--"}}

Insert your browser log here, this could for example include:
a) The javascript console log
GET https://nextcloud.tennis24.ee/index.php/apps/weather/ 500
jquery-migrate.min.js:2 JQMIGRATE: Migrate is installed, version 3.4.0
session-heartbeat.js:103 session heartbeat polling started