Inconsistent indentation: 9 spaces used for identation

I tried to modify the Gitlab index.html.haml file in server. I just want to display my message instead of Default message. So I modified 14 line to following code

%i GitLab team
can add the members. Please request the team if you need. 

But I get following error in production.log

enter image description here

I modified the space before the %i GitLab team to 8 space and tried the same thing. But I got the same issue. I tried restart and reconfigure also in the machine. But it is not worked. It is not worked even I modified the content to original old content. How can I overcome this?