This is because you have not selected a first/native language. However, this is the most important item in your profile.
1. Go to “Languages” in the profile tab and select your native language from the options shown at the bottom left in the menu.
2. Then select the item “Native language” in the menu on the right.
3. Save this information with the green button.
The language ought to appear in the overall view and you can now access the other areas of the Workplace.