With the teardown in place, a syntax error is always thrown on the first line of the script:
Subtest `Create New Service` threw an exception
Error: Syntax error, unrecognized expression: button[text=Create a New Service] => .x-btn-inner-default-toolbar-small
at line 28462, character 8, of https://localhost/siesta/siesta-all.js
at line 29114, character 11, of https://localhost/siesta/siesta-all.js
at line 29541, character 20, of https://localhost/siesta/siesta-all.js
at line 27760, character 9, of https://localhost/siesta/siesta-all.js
at line 23581, character 24, of https://localhost/siesta/siesta-all.js
at line 18578, character 56, of https://localhost/siesta/siesta-all.js
at line 27392, character 20, of https://localhost/siesta/siesta-all.js
at line 39970, character 27, of https://localhost/siesta/siesta-all.js
at line 825, character 32, of https://localhost/siesta/siesta-all.js
at line 40187, character 36, of https://localhost/siesta/siesta-all.js