PHP7 mbstring error in Drupal7

In the installation of Drupal 7 in Centos 7, i'm getting the error:

Unicode library
Error Multibyte string output conversion in PHP is active and must be disabled. 
Check the php.ini mbstring.http_output setting.
Please refer to the PHP mbstring documentation for more information.

But, this is installed and listed in phpinfo().

In /etc/php.d/20-mbstring.ini file are de configuration, and i'm forced to use the deprecated values mbstring.http_input and mbstring.http_output.

; Disable HTTP Input/Output conversion
mbstring.http_input = pass
mbstring.http_output = pass
; Disable HTTP Input conversion
; Optional?
mbstring.encoding_translation = Off 


; Enable mbstring extension module
extension=mbstring.so

With this I'm solved the problem.