Hi Dennis Minard,
There are a wide variety of possible reasons why a test works one day and fails the next day. To be able to figure out how to improve the reliability of your tests we need to better understand exactly where and why it's failing. You say it often fails on the login page. In what way? Is it not accepting the login? Is not not clicking the login button? Can you tell us exactly in what way is it failing? Do you have a particular test step that it is failing on? Is there an error message when it fails?
All the best,
the Telerik team
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