When makng a CLI update as mentioned above, got an update to 21.0.1. In the process I got ths error:
2021-04-10T08:59:09+02:00 Checked for update of app “files_e xternal_gdrive” in appstore
An unhandled exception has been thrown:
Error: Interface ‘OCA\Files_External\Lib\Config\IBackendProv ider’ not found in /var/www/nextcloud/apps/files_external_gd rive/lib/AppInfo/Application.php:32
Stack trace:
#0 /var/www/nextcloud/lib/composer/composer/ClassLoader.php( 478): include()
#1 /var/www/nextcloud/lib/composer/composer/ClassLoader.php( 346): Composer\Autoload\includeFile()
#2 [internal function]: Composer\Autoload\ClassLoader->loadC lass()
#3 [internal function]: spl_autoload_call()
#4 /var/www/nextcloud/lib/private/AppFramework/Bootstrap/Coo rdinator.php(116): class_exists()
#5 /var/www/nextcloud/lib/private/AppFramework/Bootstrap/Coo rdinator.php(86): OC\AppFramework\Bootstrap\Coordinator->reg isterApps()
#6 /var/www/nextcloud/lib/private/Installer.php(146): OC\App Framework\Bootstrap\Coordinator->runLazyRegistration()
#7 /var/www/nextcloud/lib/private/legacy/OC_App.php(431): OC \Installer->installApp()
#8 /var/www/nextcloud/lib/private/Updater.php(423): OC_App-> enable()
#9 /var/www/nextcloud/lib/private/Updater.php(268): OC\Updat er->upgradeAppStoreApps()
#10 /var/www/nextcloud/lib/private/Updater.php(132): OC\Upda ter->doUpgrade()
#11 /var/www/nextcloud/core/Command/Upgrade.php(255): OC\Upd ater->upgrade()
#12 /var/www/nextcloud/3rdparty/symfony/console/Command/Comm and.php(255): OC\Core\Command\Upgrade->execute()
#13 /var/www/nextcloud/3rdparty/symfony/console/Application. php(1009): Symfony\Component\Console\Command\Command->run()
#14 /var/www/nextcloud/3rdparty/symfony/console/Application. php(273): Symfony\Component\Console\Application->doRunComman d()
#15 /var/www/nextcloud/3rdparty/symfony/console/Application. php(149): Symfony\Component\Console\Application->doRun()
#16 /var/www/nextcloud/lib/private/Console/Application.php(2 15): Symfony\Component\Console\Application->run()
#17 /var/www/nextcloud/console.php(100): OC\Console\Applicat ion->run()
#18 /var/www/nextcloud/occ(11): require_once(’/var/www/nextc l…’)
#19 {main}
…and the server was stuck.
I have Ubuntu 20.0.4. Nginx.