Had the same problems…
Read that some cache solutions use .htaccess
so I took a look in that file, noticed that there were some strange references to /mounted-storage/ in the paths given.
Tidied up those lines – now it works!
RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/all/$1/index.html -f
RewriteRule ^(.*) "/wp-content/cache/all/$1/index.html" [L]
