Django TemplateDoesNotExist at / is out! (Simple but addicted to half a day!)

■ Environment

windows10 　Pycharm　Community　2019.3 　Python3.7 　Django　3.03

■ Prerequisites

It is assumed that you are creating a Django project and application. See below Until you create a Django application in the terminal

■ Event

When I went to read index.html, "TemplateDoesNotExist at /" It comes out, and index.html does not come out!

■ I tried it, but it didn't work

I researched various things and tried the following, but it didn't change ...

① Modify TEMPLATES = in setting.py as follows

'DIRS': [], 　　↓ 　'DIRS': [BASE_DIR, "templates"],

(2) Modify TEMPLATES = in setting.py as follows

'DIRS': [], 　　↓ 'DIRS': [os.path.join('app_private_diary','templates')],

■ Cause

In the first place, this error, does the file exist? Error that the file cannot be read.

Looking at the previous error

I want to read index.html, but I can see that it is displayed as index \ html.

If you look at view.py, you can see that it is index \ html.

index/html　→　index.html

After changing to, the error disappeared.

It was a basic one (crying).

that's all