What should I do if the internship supervisor is not understanding?

I am doing my vocational high school diploma which is why I have to do a one-year internship in a kindergarten

Despite crutches, I go there because I really want to get my degree. I also take tablets there every time because I get a lot of cramps and pain due to bone inflammation in my knee.

Now today was my second day I also had to work for 8 hours and my supervisor sent me to a room and closed the doors she seemed to me as if she didn't show any understanding

She made statements like it was stupid that I could only sit at the table because of the crutches and could only play with children from there and that in her opinion that would not be enough

She also said that if a child fell off the swing I would not be able to react quickly enough even though the rules state that I am not the supervisor

Unfortunately, I have to use crutches for another 1-3 months because the inflammation in my bone is healing very slowly.

I also called the employment office so that I can learn about my rights as a currently rather limited person and they can tell me how I should proceed due to my physical circumstances. I will receive a call back in 1-2 days.