No table is created.
Try to reproduce: following action undertaken: copy a form from my test environment to production (the table in test has been created while back) after running questionnaie in production no table is created. If running the form on the test environment the submission is inserted in the table. Both Test en Production are on the same level WP 4.7.1 / Divi 3.0.27 / EFORM 3.4.0 / SQL 1.2.0
My suspicion is that most likely this is security issue, with table creation.