Django：麻烦uploadind和处理图像（CSRF令牌丢失或不正确）

I'm just trying to practice with Django. I tried to make a simple app which allows you to upload an image and return the pixelated version of it. I have two views: one to show the form and one to handle the image and return the result. The problem is that a 'Forbidden (403)' is raised instead of the result. Reason given for failure: CSRF token missing or incorrect.I'm just trying to practice with Django. I trie