Need Help For Spreadsheet

I Use Airtable Spreadsheet for Data Storage. I Have 2 Column In it. 1> Post 2> Image.
Sometime User only Post Image Because The Information which user want to share is available in Image. So at that time POST column remains BLANK (Null).

So, When I Try to Get Column, Spreadsheet Doesnt Found Blank Column and Stop Request.
Is There Any Way to Detect Blank Column too?

Use is empty block.

Will You Please Explain? May Be Spreadsheet Not Allow Blank Space

When the user submit the information check if Post is empty and place a unique set of characters so it will not be empty. Something like “@$not-empty”. When get the data and set them in a list if you don’t want the “@$not-empty” replace it with an empty block.