Unable to Submit Lineup

I’ve been attempting to submit a lineup (from my PC) for a while, but no matter what I try it continues to display an error message “Network Error”. I’ve tried recording a new video, and downloading the video and submitting it from my phone (the browser since the app doesn’t have this option). The same error message pops up when I try this. My internet is fine, but I’m not sure if it could still be on my end or not nonetheless.