I don’t see such issue on my installation… apps can be downloaded/installed and removed. I run image: nextcloud:21.0
Besides I see
- some issues in Talk (not found error when entering existing calls)
- log is flooded with
/appinfo/app.php is deprecated, use \OCP\AppFramework\Bootstrap\IBootstrap
messages if config.php has'loglevel' => 0,
(change to 1 for production) - there is warning regarding default_phone_region