When we run test suite or tests with our admin profile tests are executing successfully without error but when same test suites and test executed by user it throws error "The test timed out because the max execution time (600 seconds) was reached while executing step 5 - 19" and "This step failed because the client error 'TypeError: document.getElementById(...) is null' was detected on the page being tested. See failing Test Logs. To ignore these errors in the next test run, use 'Add all client errors to warning/ignored list' links."
User is having custom atf role to executed the test suite.
