There is a known issue with Tableau Desktop and Tableau Server version 10.2.8. You may encounter a string comparison error when loading views which use very long strings and double-byte characters. For more information, please see the following KCS article.
Changes were applied to improve security. See ADV-2018-001, 2018-002, 2018-003 and 2018-004 in Security Bulletins for more details.