[BUG] Tasks Log view is broken

[ultraheroe]

Description

The Log view of tasks by default are incorrectly configured so it doesn't show any log

Steps to Reproduce

1. Run a DAG
2. Go to Task view and click on "Log"
3. The log is missing or empty

Expected behavior:
Show the DAG task execution log as normal

Actual behavior:
The log is missing, wrong configured or failed

Reproduces how often:
Always with default airflow role options

Environment

• The release version/s you are using: 2.0.0
• OS: Debian 10