First update library and check examples:
is
B4X:
Dim LoginForm As Pnd_WebElement
Explanation of your code:
"LoginForm As Object" is FORM tag and everything inside <form> </form>
"Dim Login As Object" is INPUT field inside <form> </form> tag. Login is a child WebElement of his parrent WebElement LoginForm.
It is much more easier to update library and use new classes and properties.
Not tested code, with updated library:
B4X:
Dim LoginForm As Pnd_WebElement = Selenium.FindByClassName("formV2")
Dim Login As Pnd_WebElement = LoginForm.FindByName("name") ' searching for name="name" inside LoginForm WebElement
Dim Pass As Pnd_WebElement = LoginForm.FindByName("password") ' searching for...