Error - modify specific access

Hi
The modification of the specifics accesses grave in error and the modifications are not made.

This is the log :

2016-04-07 15:07:58.897 ***** ERROR ***** ERROR *****
2016-04-07 15:07:58.898 ***** ERROR ***** on file 'C:\www\projeqtor_bacasable_dsi\tool\html.php' at line (541)
2016-04-07 15:07:58.900 ***** ERROR ***** cause = ucfirst() expects parameter 1 to be string, array given

Can you help me ?

Best regard

It's un error i detected on version 5.30.

Thanks a lot