Charging system malfunction

I drive the car far enough for it to charge the battery. I drive 7-18 miles to then another 7-18 miles back home.

Also, I do mostly highway driving.

After I drove 7 miles to my cozy destination and spent about 2 hours inside of the car, the message came on the car when I tried to start it “ CHARGING SYSTEM MALFUNCTION”

Also, I also forgot to report this concerning issue. Prior to the message coming on, I noticed on the highway my power brake was kinda losing power. I don’t know if it’s in my head or not but the brake felt hard and the car wasn’t stopping like it should.