Issue

K2 Workflow API - Swagger UI is not working and you cannot access API Calls (Operations, ServerEvent, Task and etc.)

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Example of a working K2 Workflow API:

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Symptoms

It was discovered the 'X-UA-Compatible' value to IE=EmulateIE7 is incorrect:

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Resolution

To resolve this issue, change the header 'X-UA-Compatible' value to IE=EmulateIE11 in IIS Manager. 

Please note: An IISRESET is required.