signal 6 seems some bug, if you forward it to bug@, our developer will look at it further.
Yes, new version of OLS will read your .htaccess file ( but only rewrite rules, everything else will not be recognized by OLS).
If you still worry about the 2018-09-07 16:55:07.827655 [ERROR] path is not accessible: /var/www/((*))/web/wp/wp-json/, please log a ticket with us by providing tmp root ssh password to your server, we can take a look.