Today, I saw that our webmaster is not showing any data and our website is already verified. So, I got afraid that what happened to our websites but I got many of webmaster not showing data today, then I searched for this and got a previous answer from Google’s John Mueller, which is already said that “This is a known issue at the moment, and should be resolved in the near future. Thanks for your patience!” then I realized that this is a bug in webmaster and also SEO round table mentioned the same issue that “Confirmed: Google Search Console Link Data Bug – No Data Available” .
So don’t worry, this does not impact your rankings. It is just a reporting bug.
Hope It will be help, who will panic after see webmaster.