This problem occurs because of missing single quotes in your code of The Creator elements.
Please go to Appearance/Editor and find your element file (for example: when you want to set Posts element, you only see grey image) and then find in code
‘default’ = some number (for example 5000).
To fix this problem set ‘default’ = ‘5000’ and all would be work fine.
NOTICE: This is only in older versions of The Creator.