FCPX captions file not uploading to filmfreeway

Hi, I am trying to upload my captions file to FilmFreeway but am not able to do so.

I have version 11.0 of FCPX and was able to export my captions file; I can see it as a .itt file on my external drive. But when I go to upload it on FilmFreeway the file is grayed out. And I can't open the file to read it. I am assuming that I should get some sort of universal viewer app, is that right? If so, does anyone have a recommendation?

Here are the trouble shooting comments from FilmFreeway:

Troubleshooting:

Make sure the subtitles start from 00:00:00 and not at the 1-hour mark.

Subtitle issues often arise from incorrect format or file encoding. The file should use Unix line endings and be in ASCII format. We've observed that some programs may produce slightly different formats, which can cause compatibility issues.

Additionally, ensure that there are spaces between the arrow symbols ( --> ) and the timecodes, and that the timecodes are not connected from start to finish.

Since I can't view the file I have no idea if my .itt file has Unix line endings and is in ASCII format, etc.

Thank you,

Paul