I know there are several people experiencing the same problem on Streemian. After selecting your curation trails (which is supposed to auto-vote from your account mimicking the trails you follow) I was constantly getting an error under my profile name. It would have a red "x" next to voting weight sufficient. I'd have to re-enable it, but within just a few seconds it would be reset! I know that many of you have had the same issue.
I think I've found a solution to this problem: finally. It's worked for me so far anyway.
You have too many curation trails selected. What I did was go through and delete all my curation trails. I then found ONE that keeps an average of around 83% for its followers. I did this several hours ago and I've not had to go back in and re-enable it thus far.
I believe I just had it set to vote way more than my account could handle. Which would obviously trigger a fail-safe.
Hope this helps.