Google Page reject to index

My page uses to get indexed and was working normally, but from a couple of days, console start showing the too many redirections error which was not in the past. But the site was normal and is not edited by anyone. From that day which shows the error of too many redirections, slowly my pages are not in google anywhere. It also says that google bot is refusing to crawl but when i look at robots.txt file it was normal which is

Sitemap: User-agent: * Disallow:

whenever i try to reindex it refuse. Why is that problem is occuring, i don't have any idea.

I have checked all the things but couldn't able to fix and now i am contacting to the google. Please help to sort out the error.