Hi @Anonymous,
Could you please share more details about your sharepoint list?
I have made a test on my side to create a sharepoint list as below:

You could refer to screeshot below to create the flow:

The exression of the Title field in the Create html table action as below:
item()?['Title']
The exression of the Task field in the Create html table action as below:
item()?['Task']
The exression of the Assignto field in the Create html table action as below:
item()?['Assigned_x0020_to']?['Email']
The flow would run successfully as below:

The email would be sent as below:

Best regards,
Alice