recently I upgraded my angular app from bootstrap 4.5 to 5.1.1 by editing package.json file.
"dependencies": {
"bootstrap": "5.1.1"...
I faced below issue after upgrading.
ModuleBuildError: Module build failed (from ./node_modules/sass-loader/dist/cjs.js):
SassError: Undefined mixin.
╷
7 │ ┌ @include hover {
8 │ │ color: $color;
9 │ │ background-color: $focus-background;
10 │ │ border-color: $focus-border;
11 │ └ }
Any idea?