Hi @masaka and welcome to the Mattermost forums!
Are you sure you have Mattermost server 5.0.0.10? I’m not aware that such a version exists and if so, it’s very, very old.
Can you please check the exact version in your “About” screen again when connected via the browser?
You can also connect to this URL and scroll down to the bottom to see the Version attribute:
https://your-mattermost-server/api/v4/config/client?format=old