Envato Elements used in Final Cut Pro aren't showing up - error in import is unsupported file

I edit on Final Cut Pro X and I’ve used downloaded transitions, lower thirds, titles, etc, from either free friday files or the months I paid for membership to envato elements.
I updated FCP recently but had used it since. Now none of my titles or transitions that were mapped into FCP are showing up. It shows a triangle with ! and I checked that they were in the correct folders, so I went to import again and all of them won’t import and the reason is unsupported file.
Help! What can I do to fix this? Thanks in advance.