Well the cookie cutter pinned topic is how you install syncler. Instead of the provision app follow the guide to manually install it. I dont like when people tell me they tried everything because it typically means they haven’t. There is alot of user error when it comes to syncler, you will need a phone or a different thing to use a browser then install providers.
If you have s+ all y ou need is ONE express and ONE cosmos provider. If you dont have s+ you can only use kosmos and only one works. For s+ users use jacked up and manually install and forget about the provision app. Sounds like you are not installing the codes properly and its failing. Use a phone or tablet for the browser part.