Export to .IFC - Technology preview error - ORD 2021 CE R1

I am trying to use the export corridor to IFC command and getting the below warnings from message centre.

And getting the below error and no file is created.  

Take advantage of this Technology Preview, a non-public software service and/or application for evaluation purposes only. Please use the Technology Preview in your normal business environment as needed to form an opinion concerning the performance of the Technology Preview. Bentley personnel would welcome your valued feedback concerning the performance of the Technology Preview as you evaluate the capabilities. Please be aware that at some point, you may receive notice from Bentley that such use must cease or this Technology Preview will become unavailable to you. As we receive feedback, this Technology Preview may also be enhanced, updated or also discontinued without notice. As a Technology Preview, it is provided to you "as-is" without the benefit of any Bentley warranty, indemnity or support obligation. Thank you!

Can anyone advise what the issue is here?

Thanks

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