Why is the Approve button disabled in GitHub "pull request review"?

Looks like workaround until github adds BE validation :) But just open DevTools in your browser and remove disabled prop from the 'approve' radio button input. Works for me.

If you were the one who has committed the pull request you cannot approve or request changes on this pull request. It's only available when someone else requested such action.

So your only option is to comment it.

for me, the only option was disabling it.

disable Require pull request reviews before merging under settings > branches > the branch

I am the only developer of my project, so maybe I cant review my own pull request. I make a pr, then merge it if tests pass....I know my answer doesn't answer the question exactly, but none of the fixes above worked....

I am the only developer in my github profile. I am admin of the project. Yet I am not authorized to approve my own PR. I do see an option to merge using admin Priviledges.