The Google Console says my site had a 404 error on all pages for two weeks. In that time the traffic to the site went to almost nothing. In troubleshooting, I tried to add a sitemap and fetch pages manually though the Console and it cannot fetch pages from the site.
This was the error message in the Google Console when the first 404 errors began:
This is a screenshot of performance:
This is the Index Coverage bar chart by day showing the errors:
Is this a problem with web hosting viruses? How do I fix this situation?