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Uncaught TypeError: Cannot read property 'selectSingleNode' of undefined.
The expression mapping error was caused by a caching issue.
- Ensure you have K2 4.7 installed.
- Install the K2 4.7 February 2017 Cumulative Update.
- Get the K2 4.7 February 2017 Cumulative Update FP7 from Regional Support.
- Install the K2 4.7 February 2017 Cumulative Update FP7 to apply the fix.