I have an ongoing issue with Muse now for several months, and despite uploading several updates from Adobe, I am having the same issue. Muse starts to load and then fails to complete loading. In January, i managed to get Muse to go all the way to loading afetr several tries. But Now I have a newer version, it is back to not working again. It seems this problem has been around for some time, it is about time that Adobe made a fix that actaully worked for this. Poor Service.
Apologize for your experience. Will do my best to help.
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