Since applying a new theme to my website and moving to https from http, I recieved a warning about malware from search console.  It says some of the downloadable content is malicious, and this is on both the http and https properties.  I don't have any downloadable content, just picture, texts and links.  I checked the box that says "I have fixed these issues" and asked google for a review.  Now a week later, the warning has returned. It says this:-

"Some or all of the downloads on this site are showing "uncommon download" warnings."

When I download a list of urls that are affected, none are listed.  Any idea what's going on and what to do about it?