Oh! That should not happen!
I am sorry to hear! What Unity version are you using?
Could you please write me on jacky@gentleland.net ?
Then I can help you further!
Ah, never mind, I was using an old project and tried to import the file which resulted in this error. I just created a new project and the import works fine, so no further issue here. Thanks for the fast support :-).
Glad to hear! Wish you all the best! :D