As I did a bundle update yesterday, I broke bootstrap-icons.

Here is the little change which I did to display icons (in development mode) again.

in file app/assets/stylesheets/bootstrap_and_overrides.css.scss

I inserted ‘assets/’ to the path at the very top of the file.

Original

// Set the correct sprite paths
$iconSpritePath: image-path('glyphicons-halflings.png');
$iconWhiteSpritePath: image-path('glyphicons-halflings-white.png');

Fixed

// Set the correct sprite paths
$iconSpritePath: image-path('assets/glyphicons-halflings.png');
$iconWhiteSpritePath: image-path('assets/glyphicons-halflings-white.png');