I've already tried with new wallets, browser and terminal . If you follow exactly tutorial, everything works smoothly, you can't encounter any error, like you said .
Browser mining and staking is working perfectly , just clean your browser for old cookies, and go to webdollar.io .
If you insist with that bullshit , it's obvious you're just trying to make FUD ( probably to buy some coins cheap ))
Like a said , I do invite everybody to try, then come back and share his experience.