Google Calendar workflow suddenly failing

I translate my Shopify orders into Google Calendar entries. This workflows has worked well for months, then today all orders have failed to translate to Google Calendar. with the following error: Required field Title missing.
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Here's the data from a step from yesterday that worked fine:
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And here's the data that resulted in the above error:
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Both look identical. The workflow hasn't been edited. what does "title" mean in Google Calendar, there is no field "title". If it means Summary, the summary is still there to be used.

Can someone help? Thanks!

Hey @wibbler

Please allow us some time, we are currently looking into it.

Hey @wibbler

We have made some changes in the desired action step, so kindly reconnect the application and try again.

I hope this might help you out.

Ok thanks. I will monitor.