Martina888 & marcoscortes, in case you haven’t found a resolution to this issue, please go to http://meronbareket.com/fixing-the-backwpup-error-dropbox-api-59-unknown-cipher-in-list/
Easy fix!
Thank you! I will check it out!
Hi. I am having the same issue. How did you fix the problem? Thanks!
http://dandelionnotes.com
