It could be because there's not enough space or time within the story to incorporate it properly. Or perhaps it contradicts something that's already been established and would create confusion for the readers.
Maybe it doesn't fit the overall theme or plot of the story. Sometimes adding certain things can make the story confusing or less coherent.
They might say it if it doesn't fit the plot. For example, if the story is a mystery and the thing is too obvious and would ruin the suspense.
Perhaps the version of Story 2020 you're using has a bug. Another possibility is that your music file is corrupted or not in the correct location for it to be added to the story.
Maybe it's due to copyright issues. Some music has strict copyright protection, and using it without permission could lead to legal problems.
Maybe it's a limitation of the platform or app you're using. Some have restrictions on adding multiple photos at once.
Maybe it's because business stories are usually more focused on facts and information, and music could be seen as a distraction.
Maybe it's due to copyright issues. Some music is protected and can't be used without permission.
It could mean that a particular element, perhaps an idea, event or object, is not suitable or allowed to be incorporated into a story you are creating or working on.
Maybe it's a technical limitation of the platform or system you're using. Sometimes there just isn't the capacity or functionality for multiple stories at once.