To register following information in Settings
It is accessible via browser with same account and password.
However, it reports following error when clicking Publish in Project.( the account and password is confirmed many times, so mannual input mistake can be ruled out.)
Please try removing the proxy information from the connection settings.
I can see the ThingWorx Experience Server information in there.
However proxy information should be a proxy host that you use on your device to access the internet.
This is something that should affect you company-wide, not only on ThingWorx Studio.
Proxy Server / Proxy User / Proxy Password should be empty
I just noticed that you've opened quite some thread for the same topic.
I think Giri already suggested the same technique in ThingWorx Studio project can’t publish successfully.
Despite that I would just refer to Moritz' document around proxy configurations... it's quite good
Please follow the comment- https://community.thingworx.com/thread/40521#thread-message-52686
If that doesn't work, validate the URL under Config -> Info