DBMS Login form

Category Image 101

so we were trying to make a simple log in form and our professor simply told us to copy the codes he wrote:

ddasdasd.png

i copied it but i got a red line under line 20 and 21 . I dont know what to do, no one is responding to me in the class and my professor never responded when he saw my question. here is the whole code if you cant see it whole in the picture:

ddasdasd.png