[BUG] Fails to paste table with blank cells in header row

[NickN-Eng]

Thank-you for creating this plugin!

Describe the bug
The plugin fails to insert excel tables which have blank cells. I have manage to work around this by putting spaces into my excel table which are supposed to be blank.
Granted, this is not legitimate markdown, as header rows cannot be blank.
The real problem is that there is no warning of the failure to paste, so I was left wondering whether the plugin was working or not for 30 mins.
Perhaps empty cells could be replaced with a space?

To Reproduce
Try and paste the following table where cell A1 is completely empty.

Plugin version:
version 0.4.0

[SpontaneousDuck]

+1 To this! I am also seeing the same thing.