Cannot populate articles with category name

[amjadniazi48]

Bug report

Describe the bug

I can populate articles with categories using the following url http://localhost:1337/api/articles?populate=*

But if I use following request as mentioned in the documentation it shows the internal server error

http://localhost:1337/api/articles?populate=category.name

Expected behavior

It should give me the category name only with articles

Screenshots

Code snippets

If applicable, add code samples to help explain your problem.

System

• Node.js version: 14
• NPM version: 7.5.2
• Strapi version: beta 7
• Database: postgres
• Operating system: windows 10