BuddyPress.org

Dear,

I noticed I had a problem 2 sites. When i created a Group in buddypress i noticed there was a button rss feeds. I clicked on it and it gave a red page with:
This page contains the following errors on line 6 at column6: XML declaration allowed onley at the start of the document. Below is rendering of the page up the First error.

When I used controle U , I see indeed there is a white space and the code start at the 6th line with
<?xml version=”1.0″ encoding=”UTF-8″?>
I have this problem in 2 of my site. I don’t know how the problem was created. I deactivated all the plugins, I changed my generatepress theme with 2017 theme. I used the plugin: Fix my Feed rss repaire on 1 of my site. When i actived and go to Group –> RSS –> I see somethings new. I some codes with as title: THIS XML file does not appear to have any style information associated wit hit. The document tree is show below.

Searching a bit around i found that it could be that my function.php has a white line problem. I didn’t find any, but to be shure i changed it back to the original.

Does anyone know what went wrong with RSS in buddypress groups and how could i fix this for 2 of my sites?

thank you?
nice day