How the connection works
Soundiiz signs you in through Plex.tv, with the email and password of your Plex account. Plex then points us to the servers you own, and we ask yours for its audio playlists. Nothing is typed into a Soundiiz form.
So the two halves fail differently. A sign-in that will not start is a browser problem. A sign-in that works and then drops you is a server problem, and that is the more common one.
What your server needs
The sign-in page will not load
-
Turn off your content blocker for the page
This is the usual culprit, uBlock Origin above all. Switch it off for the page, then reload and try the connection again. -
Clear the browser cache, or use another browser
An old cached page can keep serving a form that no longer works. A second browser tells you in one try whether that was it.
You sign in, then get disconnected
This one means the same thing every time: we reached Plex, then failed to reach your server. Either nothing outside your network can get to it, or it took too long to answer. Anything standing between the internet and the server does that. The platform left blinking on Connecting instead of turning green is the same story, and Remote Access showing green on the Plex side does not settle it: that light says your server reached Plex, not that we can.
Open a route through them, or switch them off for the connection. Cloudflare is the exception, because turning it off is rarely an option: it needs the Soundiiz addresses let through instead, and a page of its own shows how to find them in your logs. Whichever it turns out to be, your server logs name the reason it refused, and they are worth a look before anything else.
Frequently Asked Questions
I am connected, but no playlist shows up
Three things cause that. A PIN on the Plex profile keeps us out of it. A remote port set by hand stops answering the day it changes. And a second music-type library, an audiobook one for instance, can stand in for the one you meant to reach: remove it, then create the library you actually want connected.
Does Soundiiz get my Plex password?
No. You type it on the Plex.tv page, and what comes back to us is a permission to reach your server, which you can withdraw whenever you like.
My server runs on a NAS. Is that hopeless?
Not at all, as long as the NAS lets the server answer from the outside. What blocks us is the private network some of them keep the server on, not the NAS itself.
Do I have to leave the server on?
Yes, both to connect and to transfer. Your music lives on that machine and nowhere else, so a server that goes to sleep halfway through takes your playlists with it.
Do I have to fill in the connection settings on the sign-in page?
No, and leaving them empty is the right move for almost everyone. That folded-away form exists for setups where the automatic route does not find the right machine, and filling it in blind will send us to a server that is not yours.