How to control the execution of tasks?

Question

Project management

I need a task management system with rather unpretentious requirements, but I'm already sliding into a rework of an efront-type LMS (there is a section - projects), and I hope you can tell me:
- It is necessary to set tasks for 23 subordinates, remotely, in a single space (web interface)
- Task is performed by a subordinate, as a rule, in the form of a reporting document, which he must attach to the task. Moreover, he should not see the documents uploaded by the rest of the employees.
- The manager must download all the files sent, analyze who was late and who did not send at all, generate reports on tasks.
Everything seems to be simple, but I have already reviewed dozens of systems.
You really need Open Source and the ability to install on your server.
And I would like to hear the names of systems that can at least be finished (with the least effort) to the above requirements

Answer 1

try collaborative/teamwork services

Answer 2

Kickidler (Kikidler)