Can you post the screenshot for the same.?
I thought the issue was LR misreading the space on the external drive where the catalog file is stored, that because it thinks that I have less than 20 mb of space there (although Explorer reports that there is almost a terabyte), it was not allowing me to import anything that will add to the size of the catalog.
However - I have moved the catalog to another drive, no longer getting error message, and Import is still not available to me.
I also notice that the synchronize folder option does not even display in a right click dropdown menu when I click on a folder in the library.
Something is very wrong...