failed to open stream

Went onto my website invicta.solutions and i got this message below. My hoster says its theme related.

Warning: require_once(/home1/invicta/public_html/invicta.solutions/wp-content/themes/customizr/inc/class-fire-widgets.php): failed to open stream: No such file or directory in /home1/invicta/public_html/invicta.solutions/wp-content/themes/customizr/inc/init.php on line 175

Fatal error: require_once(): Failed opening required ‘/home1/invicta/public_html/invicta.solutions/wp-content/themes/customizr/inc/class-fire-widgets.php’ (include_path=’.:/opt/php54/lib/php’) in /home1/invicta/public_html/invicta.solutions/wp-content/themes/customizr/inc/init.php on line 175

this is the line it mentions the error is on.

else {
              require_once ( TC_BASE . $path_suffix[0] . '/class-' . $group . '-' .$path_suffix[1] .'.php') ;
          }

last thing i did on the theme was add a logo on front page..could that be related to error?

any help appreciated