There isn’t a more detailed log. Avast does its own rather than other so called black listings. Hopefully some of the other volunteers can do some more analysis of the site.

Checking the other links given by Eddy, could point the way to why the site or IP address could be being blocked. The second one gives 3 potential malicious .js files.

What is your hosting company (possibly cloudflare-nginx according to one of eddy’s links) ?
They may well have tens or more domains on the same IP and you could be getting hit by their bad rep/infection.

You can try getting dedicated hosting package, then it would only be your site on the IP.