I too got the same error while i tried to deploy the ova file which i imported.
As you suggested , I did the below steps.
open Settings, click on CD/DVD drive, check if Device Type is selected as Datastore ISO. If so, select Client Device. Save settings by clicking OK. Export OVA file, and then deploy.
it worked for me. thanks !!
I have the same issue but as i have checked i considered all necessary option must be covered before exporting OVF .
I have tried to deploy in original Host but i faced error " Unable to write Data to the transport connection regarding my attach file I have also tried with different host but the error changed to " OVF deployment - canceled by a user " I don't know how to import it and get rid of these errors .Please let me know if I can do anything else to fix it .
2019, still working !!! This solution worked for me . Thank you
Thank you for the suggestion, it works for me, I deleted the .mf file and replace the vmware.cdrom.iso to atapi and it is working.