Plugin stops the activity

On the log is appering this:

Error posting on twitter. Error: {“errors”:[{“code”:429,”message”:”We can’t complete this request because this link has been identified by Twitter or our partners as being potentially harmful. Visit our Help Center to learn more.”}]}

And it’s not sharing anymore. I’ve tried to change the password, and it’s not the problem.

Someone can help me?

Thanks!

The page I need help with: [log in to see the link]