Can't get latest rslsync to work

[Martin Marsian]

Hi, I have problems to get the latest rslsync working on Ubuntu Server 18. It worked for earlier version. But now it has stopped.

Status of resilio-sync is loaded and active. It runs as user rslsync. It listens to port 127.0.0.1:8888 so everything is ok.

My config file from /etc/resilio-sync/config.json is set like this:
 

{
    "storage_path" : "/var/lib/resilio-sync/",
    "pid_file" : "/var/run/resilio-sync/sync.pid",

    "webui" :
    {
        "force_https": true,
        "listen" : "127.0.0.1:8888"
    }
}

In order to access the Web-gui I set up a reverse proxy in plesk for Apache like this:

For http:

ErrorDocument 404 /404.html

ProxyPass / http://localhost:8888
ProxyPassReverse / http://localhost:8888

ErrorLog ${APACHE_LOG_DIR}/resilio_error.log
CustomLog ${APACHE_LOG_DIR}/resilio_access.log combined

For https:

ErrorDocument 404 /404.html

ProxyPass / https://localhost:8888
ProxyPassReverse / https://localhost:8888

ErrorLog ${APACHE_LOG_DIR}/resilio_error.log
CustomLog ${APACHE_LOG_DIR}/resilio_access.log combined

As I said these settings worked for earlier versions, but now with latest version from repository I get errors in the browser.

Brave gives the error connection refused

Firefox and Safari get a 500 error

Can someone give me a hint what goes wrong?