SO the support tool removes bad cache etc.
By selecting something isn't working correctly it might come up with database errors or bad cache.
If you get an error best thing you can do is tell people the error as we are not mind readers and there is about 50 + errors then you need to tell us that.
And yes evennamecheap can have hosting issues, it depends on how things are set up and what you done.
They are hosting with a shared hosting and quite honestly I love namecheap for domains but I HATE their hosting its so crap. IMO