Issue while recreating the old Adobe flash player module in Adobe captivate

HI team. I being an E-Learning content developer in an organization have recently got a new project for me from our old client which has become a challenge for me.

Coming to the issue, the client has given me an old module that has been previously made to work on Adobe flash player. As Adobe has removed the flash player support, that module is no longer working.

As the client wants that module to work again, I've recreated the module by using the screen recording of the old module and recreating it on captivate. While I try to preview it on captivate tool, the module is working perfectly and there is no issue and I was able to reach the last slide without any issue.

But when I publish the file to LMS, after few slides it is giving me errors on random slides which redirects me to the initial slide. I've tried and checked all the possible options and published the file again, but still getting the same error. If the issue is coming at a particular slide, I could have checked that slide. But the issue is occurring randomly at various slides and immediately redirecting me to the first slide.

The client is suggesting I build it again from the scratch. But as this is a huge module of 100 slides, building it again will be a hectic task for me. Anyone else faced the same issue previously and can help me get through this??