Which locator should I use for Click Button when Id is not static?
You can use this CSS Selector:
a[data-testid="open-registration-form-button"]
or this XPath
//a[@data-testid="open-registration-form-button"]
You can use this CSS Selector:
a[data-testid="open-registration-form-button"]
or this XPath
//a[@data-testid="open-registration-form-button"]