I think the only way to open or look at Acronis backups is through Acronis itself. Windows cannot see Acronis files so, if you are trying to look at the files through Windows, it will come up as an error such as you're getting.
Dell XPS 13 9370 (2018) review
The art of 'British' pulp fiction
Best password managers for Mac
TV & streaming : comment regarder le Tournoi des Six Nations 2018 ?