App with id name has invalid signature beim installieren von apps

ℹ️ Support
1

Hi, I have the problem that when I try to install an app
I get the message App with id namehas invalid signature.
It first happend after trying to install an untested app named dropit.
Since then I can’t install any other apps either.

[/details]

Nextcloud version 20.0.4:
Operating system and version Ubuntu 20.04.01 LTS:
Apache Version: Apache 2.4.41
PHP version: 7.4

Steps to replicate it:

  1. Go to +Apps
  2. Search for dropit
  3. Enable untested app
  4. Activate

The output of your Nextcloud log in Admin > Logging:

	Exception: App with id integration_dropbox has invalid signature
/var/www/nextcloud/apps/settings/lib/Controller/AppSettingsController.php - line 445:

OC\Installer->downloadApp()

/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php - line 169:

OCA\Settings\Controller\AppSettingsController->enableApps()

/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php - line 100:

OC\AppFramework\Http\Dispatcher->executeController()

/var/www/nextcloud/lib/private/AppFramework/App.php - line 152:

OC\AppFramework\Http\Dispatcher->dispatch()

/var/www/nextcloud/lib/private/Route/Router.php - line 308:

OC\AppFramework\App::main()

/var/www/nextcloud/lib/base.php - line 1008:

OC\Route\Router->match()

/var/www/nextcloud/index.php - line 37:

OC::handleRequest()

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

{
    "instanceid": "***REMOVED SENSITIVE VALUE***",
    "passwordsalt": "***REMOVED SENSITIVE VALUE***",
    "secret": "***REMOVED SENSITIVE VALUE***",
    "trusted_domains": [
        "192.168.2.115",
        "somedomain.de",
        "www.somedomain.de",
        "cloud.somedomain.de",
        "www.cloud.somedomain.de"
    ],
    "datadirectory": "***REMOVED SENSITIVE VALUE***",
    "dbtype": "mysql",
    "version": "20.0.4.0",
    "overwrite.cli.url": "http:\/\/192.168.2.115\/nextcloud",
    "dbname": "***REMOVED SENSITIVE VALUE***",
    "dbhost": "***REMOVED SENSITIVE VALUE***",
    "dbport": "",
    "dbtableprefix": "oc_",
    "mysql.utf8mb4": true,
    "dbuser": "***REMOVED SENSITIVE VALUE***",
    "dbpassword": "***REMOVED SENSITIVE VALUE***",
    "installed": true,
    "app_install_overwrite": [
        "dropit",
        "files_ebookreader"
    ],
    "updater.release.channel": "stable"
}

The output of your Apache/nginx/system log in /var/log/____:

Nothing about this
2

Problem solved, Just removed all Apps I did install and it worked again, even the dropit one. Strange but I fine with me.