As @Trevor.Dennis asked, it takes time to generate an video. Each model has different rendering times and so on. 3rd party models tend to take the longest.
Firefly models tend to be fastest: since they are Adobe Products
Help us. Help you. Could you try logging out of your Creative Cloud app and then log back in? This has helped me with other issues before.
Could you create a full screen video of your workflow showing us what is happening? This would help considerably.
>>Make sure to hide your personal information: email account and anything other personal details.<<