Insufficient space for area

What causes this issue?

You must allow enough space when creating areas for subscreens.

How to fix this error?

In theory, a screen element with a length of 1 represents the minimum
size of an area. In practice, this is not very useful. There must be at
least one blank space between elements on the left and right of the
area.

Error message extract from SAP system. Copyright SAP SE.