Theme development

I'm install "user relationship" this module ,but when I click the button "Become friend" and send it ,and than got this error
"Recoverable fatal error：Object of class stdClass could not be converted to string 於 drupal_write_record() (/var/lib/openshift/570e0eb189f5cf0d82000029/app-root/data/downloads/drupal-7.43/includes/common.inc on line 7297 )。"

Line 7297 is :

Greetings Everyone!
I'm having trouble with view themisation through template & making it work with the exposed filter with AJAX.
I've got view with name "object" & display id "page_1".
So i've created views-view--object--page-1.tpl.php and here goes the code of my template

Dear Everyone,

I managed to locate superfish menu bar within the "Featured" region in Bartik, but I get a gap between the "Featured" region and the "Header" region. Does anyone know how to remove this gap ?

In Drupal 8, I have a view with exposed filters, and it shows results on the page where it is placed. But I want the search results to show up on the views page I created. How do I go about doing this?

Thanks!

I've followed this documentation: https://www.drupal.org/node/2216195#override-extend but still can't seem to override css file?

This is what i have in my *.info.yml file:

I'm new to D8, and am trying to create a new theme. I'm stuck on trying to simply add a CSS file/reference globally. I'm following the directions here, and about a dozen other sites trying to describe the same thing.

Notes: