Hey! I had the same issue with ultrasurf windows last week. Turns out, my antivirus was blocking it without notifying me. Maybe check if your antivirus has a "stealth block" feature? I added ultrasurf to the exceptions list, and it worked fine after that.
Also, I’m using version 18.06, and it’s been stable for me. Maybe try downgrading if the latest version is acting up?
Also, I’m using version 18.06, and it’s been stable for me. Maybe try downgrading if the latest version is acting up?