Bug with adduser. No cant add new users

Before it could add new users, but today suddenly, I put to add to a new user and it gives east error me.

Then change of version 5.8.5 to the 5.8.0 and works, I can add users. But now I put myself to add that user of before again and it gives the error again me and no longer it lets add users to me.

The error that I have is the following one:

[L] site adduser test test *@*
[L] 500 test: xx xxx xxxx xxxx x xxx xxx x xxxx.

not that it can happen to him.

Thanks