I am having this issue:

"Google couldn't crawl your site because we were unable to access your site's robots.txt file."

I have already tried all the suggestions provided in the related problems but nothing seems to be working. I am using a plugin that has my site in maintenance mode. Could that be the issue?

I have made a robots.txt file and pushed it in the root directory but the problem remains.

P.S: Some people suggested it was due to the Yoast plugin, so I have deactivated it. Also, I am using Google XML sitemaps and I have unchecked the option where it says to make sure the physical robots.txt is in the root directory. But the problem still remains.