Uploading SCORM error

Hi, Just a shot in the dark here.....

I've had a course developed by an external provider, and I uploaded it to a previous LMS and it ran with no problems at all.

We've since move over to a new LMS, and I cannot for the life of me get it to run, and am getting an error 404 message every time we try to run it.

I've also tried to upload it to another LMS (docebo) which is telling me "Some of the archive files are not allowed" and won't upload it.

Anyone ran into anything similar? The LMS provider is saying it's the content, (it worked previously though in our old LMS), and the content provider is saying it's the LMS!!

Thanks in advance!