Try to test some Fields and when i check "Inspect element" to identify id or name of Fields but there was only class that didn't work so i decided to use XPath for example:
$I->fillField('/html/body/div/form/div[2]/div[3]/div/div[1]/label/span[1]','GRV');
And gets Failures and Error:
1) Couldn't sign in in Authorization
Ups, I couldn't fill field "/html/body/div/form/div[2]/div[3]/div/div[1]/label/s
pan[1]","blabla",
Field by name, label, CSS or XPath '/html/body/div/form/div[2]/div[3]/div/div[1]
/label/span[1]' was not found on page.
I checked few times XPath, can't test this fields. It would be great if you tell what a problem and how to solved it.