Unable to Import Movies to Trakt

Hi,
I’m having trouble importing my tracked movies into Trakt. I exported my movies from TVTime using the TVTime Liberator to a JSON file, but I’m unable to import the file into Trakt.
When I try, I get the following error:
error (Importers::Config::Errors::InvalidIdValue)
Has anyone else experienced this issue or can anyone provide a solution?

Thanks in advance!