It's related to the configuration of Steemit's ImageHoster (https://github.com/steemit/imagehoster). You can't upload images as long as your account has a reputation < 10.
Defined in imagehoster/config/default.toml
[upload_limits]
duration = 604800000 # in ms (=1 week)
max = 300 # max requests within duration
reputation = 10 # minimum reputation needed for upload
How to restore reputation
You need to receive more (stronger) upvotes than downvotes. If you try to make money with other people's work, your account will be put on a blacklist and you won't have much fun on Steem. Without hard work one won't earn high rewards here in most cases.
I don't know what exactly you did wrong to come to a reputation of 5, but I guess you should do the opposite of what you did before.
Be creative, don't copy from others, write your own stuff and take part in the community (writing good comments on other posts would be a good start). Of course, without many followers your posts will not be seen by many curators, so it's a step-by-step process to become successful on Steem.
Thank u,I will check my behavior.