Hello Abhishek Bhargava;
The following error is met while accessing views or dashboards on Tableau Server, while Incapsula proxy is used and the caching is enabled. Navigation to non view or workbook content within Tableau Server does not cause an error and is rendered as expected.
Are you using Incapsula proxy?
See Site performance settings for more information.
If not, let me know and we will investigate this further
Lénaïc RIÉDINGER, Global Community Engineer Tableau
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