When you have an answer ban, **you cannot post any answers.  At all.  Not even to your own questions.**  All answers are blocked when you have an answer-posting ban.

This is part of the system.  You can't post any answers on a site where you have an answer ban until you resolve the issue which got you answer-banned to begin with, and show other positive contributions until the system removes the answer ban.  (Moderators and SE Employees can't remove such bans)

[You might want to visit the Help Center](https://askubuntu.com/help/answer-bans) for more details, but you need to provide other non-answer contributions to the site so the system can see that other positive contributions outweigh the negative contributions that got you the answer-ban to begin with.

Also read [this thread on Meta.SE](https://meta.stackexchange.com/questions/86997/what-can-i-do-when-getting-we-are-no-longer-accepting-questions-answers-from-th) which is also very relevant and touches upon the details about what led to the ban and what you can do to fix the problem.