Unable to post an answer to a topic

Question

I am unable to post an answer to my post:

https://learn.microsoft.com/en-us/answers/questions/2181913/webapp-wont-find-github-hosted-resources?source=docs

I get the following error:

Please fix the following issues to continue: You are not authorized to make this response. If you believe this to be in error, please refresh the page and try again.

Answer 1

Try deleting all your browser's cookies, cache, and history for all periods.

Please post in the answer section if you solved the problem yourself.
Please post your reply to advice given in the comments.

<Japanese>
ブラウザのcookie・キャッシュ・履歴を全て全期間削除してみて下さい。
回答欄は自己解決した場合に投稿して下さい。
アドバイスされた内容への返信はコメントで投稿して下さい。