As a SE optimizer I've seen many website owner to fall in trouble with their webmaster tool error report. Most in case they generally ignore always to check out webmaster or don't give proper attention to take action to solve those errors in time. As a result I've seen many website to get out of current rank slowly by time! It means any small or little kind of error issue can directly affect to your website current search result ranking by several keywords. Thinking about it, I've recently opened a service about solving this type of webmaster tool or search console issues as a gig on Fiverr. In this service I'll solve all kind of webmaster tools issues like site index problem, sitemap not found, crawl errors, url not found(404, 301, 503), duplicate content, blocked resource etc!
https://www.fiverr.com/asadul549/solve-google-search-console-or-webmaster-tool-issues-of-your-website
So its time to be careful about your running website current ranking progress. This is not marketing! I also will appreciate to give you all kind of open suggestions. Feel free to contact or ask any question. Thanks!