As nextcloudd has no native support for asynchronous operations, due to the use of php, this aplication is deprecated, and will no longer support the Nextcloud' future versions (19+). I did not find a way to implemement true support for interactive and long running occ tasks in a web terminal whitout introducing addtional dependencies (through websockets, for example), the lack of true asynchronous occ operations can lead to serious alterations of voluminous instances. This issue may give some hints on why I decided to not support this application anymore.

Place this app in nextcloud/apps/

• The application is not a real interactive terminal and does not support long running tasks. So if your instance is pretty big, commands like occ files:scan will time out and fail.
• Do not use occ maintenance:mode --on, obvious...

See open issues