I notice some people has been having Problem on steem account don't worry all will be solve.
Some of the problems that occur
(1) You can't post
(2) You can't vote
(3) You can't resteem
(4) You can't comment
(5) You can't view a post
(6) You can't make a trade
Is time to put End too all error occurring
First this you need to know is that steem have a "VOTE POWER".To see your vote power visit 
and also steem have a "STEEM POWER" that show Influence tokens which give you more control over post payouts and allow you to earn on curation rewards.
Part of STEEM POWER is currently delegated. Delegation is donated for influence or to help new users perform actions on steemit. Your delegation amount can fluctuate.
If your steem power is low is can make error occur
For more information feel free to ask..