If you are receiving an error Unable to get property 'suspend' of undefined or null reference you can try to resolve this by enabling the in-memory mode for CloudExtend Excel for NetSuite.
To run the app in in-memory mode, follow these steps:
Step 1: Close Excel.
Step 2: Open Internet Explorer Browser -- Click the settings icon in the top right corner-- select Internet options.
Step 3: Click on the Settings button under the General tab.
Step 4: Click on the Caches and Databases tab.
Step 5: Uncheck the Allow website caches and databases checkbox.
Step 6: Save the settings.
Step 7: Reopen the Excel workbook and try again.