i tried to play solo - roblox studio opens, "failed to open the document". i created a server - "failed connect to the Game. (ID=15)". even got the "ID=14" one. i watched a tutorial, searched in google - nothing works. i don't know what to do. i also tried to play in novetus beta one, but playing solo got me a "ID=15" error.

its been 2 weeks, no answer

Hello, ive been having (almost) the same problem. I cant play on localhost it keeps showing me id=15, i was looking almost everywhere for solutions and none of them work. One of them was to turn off firewall which i did but it still didnt work, i tried to look for every antivirus and try to disable them, also didnt work. this is an old used computer i got from my family member (it got windows 7 ultimate) I honestly dont know what to do anymore, maybe try turning off the firewall if you didnt try that but dont do the antivirus part if its not an old computer if you know what i mean