Portal end

the final portal in the world map does not work, I went to meet it with the eyes of the end, when I got there there was no portal or anything, there were even some stairs, but other than that there was nothing else, neither washes nor the construction of the portal, where you put your eyes to the end, there was literally nothing but an empty cave. now how do i go to the end without the portal in my world? please answer me how to fix this