Why is the program unable to locate my base.html, when the error message has the correct path?

Using Django Mystery Errors
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This is my first time reaching out over the internet, so please forgive me if I violate any formalities. Thanks in advance to anyone taking their time to help me!

I am running my program with Django 4.2.1 and Python 3.11.3. I am using Visual Studio Code on a MacBook.

My program was running fine, until I attempted to create a template html file and use another html file to extend it. I keep getting the TemplateDoesNotExist error, and I am now at a lost as to why. I know it is probably something simple that I am overlooking. I am trying to learn Django, and am hitting a road block here.

The full project can be viewed here:
https://github.com/NoahSyler/LearningDjango/tree/main

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The copied path to the file from finder → /Users/noahsyler/Documents/Comp Sci/monthly_challenges/templates/base.html

The path from the error page → “/Users/noahsyler/Documents/Comp Sci/monthly_challenges/templates/base.html (Source does not exist)”

- In settings.py, `APP_DIRS = True`
- I have tried `BASE_DIR / "templates"` In DIRS 
- I have tried `os.path.join(BASE_DIR,'templates')` in DIRS
- templates is in the root of the app, the same folder as manage.py
- As far as I can tell, everything is spelled correctly. I copied and pasted the names from the error message into the folder & file names to make sure everything is consistent
- The error message says "monthly_challenges/templates/base.html (Source does not exist)," but this is the correct path 
- I have looked at other posts and asked chatGPT, but I cannot tell what I am doing wrong.
-To make sure it is not an issue with the file permissions, I set the permissions of the file to rwx.
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Side note: If you surround a url with the backtick - ` character, it’s not rendered by the forum as a url and so doesn’t trigger those limitations - e.g http://example.com
(Also, if you’re posting code or templates here, you want to surround the entire block of code or template between lines of three backtick - ` characters. This means you’ll have a line of ```, then your code, then another line of ```.)

For some reason, I seem to remember reading an earlier thread that some people have had problems with spaces in directory names. (Unfortunately, I’m relying on my memory - I can’t find the relevant thread.) I’d try renaming “Comp Sci” to either “CompSci” or “Comp_Sci” to see if that helps. (You may have other references that might need to be changed as well - I’m not sure.)

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Thank you for the feedback! I have updated the link.

I tried changing “Comp Sci” to both “Comp_Sci” and “CompSci,” but the issue persists.

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I will set up another environment to run the program in later to see if the issue goes away. This definitely has me stumped right now.

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I think I found it. In your index.html you have:

{% extends "base.html "%}

Note you have an extra space after the file name.

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That was it! Thank you so much!