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Firmwareupdates and soundpackages require the command ccrypt to work properly. Any update must be decrypted by that command. By renaming it, you technically disable your vacuum's ability to update firmware/install soundpackages.
mv /usr/bin/ccrypt /usr/bin/ccrypt_
chmod +x /usr/bin/ccrypt
Reverse (to install updates and soundpackages again)
Check that /usr/bin/ccrypt_ exists (you do not want to delete your actual copy of ccrypt)
mv /usr/bin/ccrypt_ /usr/bin/ccrypt