MIME-TYPE Exception Main.css Spring Boot

I am really confused about how to approach the resolution for this bug. There are many supposed solutions for different situations that don't seem to apply to me directly. And hopefully, as I find answers to this question, I can comprehend what exactly is going on here. Please note I'm using Spring Boot for this Project

Problem

I have successfully implemented Sass into my project and it appears to be working correctly. I can designate the source and target folders in my pom.xml. However, whenever I attempt to reference the CSS file in my HTML file, I am unsuccessful. The error I am seeing in Chrome Dev Tools is this:

Refused to apply style from 'http://localhost:8080/css/main.css' because its MIME type ('application/json') is not a supported stylesheet MIME type, and strict MIME checking is enabled.

This is the result of my searching:

• Stylesheet not loaded because of MIME-type Q #1 I initially searched up the specific error and received this StackOverflow post. The linked answer states that he believed that the problem was related to a CSS library starting with comments. I believe he thinks because of some comments, the MIME-type had changed. So I attempted to remove all comments in my final css file. Once again, no luck.
• Stylesheet not loaded because of MIME-type Q #2 Another lower answer on the same post states that the error can come up when you're not referring to your CSS file properly. I believe this is likely the case, but I don't completely understand how my setup of spring-boot is handling the static files, or if it is not doing so at all because of lack of configuration.
• Stylesheet not loaded because of MIME-type Q#3 This answer further solidifies the case that my CSS file path is wrong, and that it's returning
  "status: 404 with some Not Found content payload of HTML type". And because of this, it makes sense why it would return a MIME-type exception.
• https://stackoverflow.com/questions/55178482/mime-type-text-html-is-not-a-supported-stylesheet-mime-type This question seemed to be aimed at something unrelated to Spring-Boot, so I concluded that it wouldn't be very helpful to me.

After not being successful with resolutions to the MIME-type exception, I realized perhaps I didn't completely understand how resources were made public in a Spring-Boot environment, so I searched for information about this:

• https://stackoverflow.com/questions/21203402/css-not-loading-in-spring-boot
• https://stackoverflow.com/questions/45536972/how-add-css-and-js-to-spring-boot-application
• https://stackoverflow.com/questions/27170772/where-to-put-static-files-such-as-css-in-a-spring-boot-project

Most of the answers to these questions required @EnableWebMVC to be disabled to allow the auto-configuration of Spring-Boot. However, the tutorial I'd been following had used @EnableWebMVC and I didn't want to try and approach the more complex method of configuring a WebSecurityConfigurer, especially since I still don't understand how to do the basic approach.

My next theory was that Spring Boot Security may be restricting access to the css files.

• https://stackoverflow.com/questions/25368535/spring-security-does-not-allow-css-or-js-resources-to-be-loaded
  I've attempted to utilize the various security permissions, but I wasn't able to get it working.

File Structure

File Structure

Source Code

You can find all of the relevant code here in the repository: https://github.com/CloakingOcean/CampaignChronicle

Thank you for anyone taking the time to assist me! I really want to progress forward in spring development, and with help from all of you, I just might!

Ah, I've figured out my mistake. My project is depending on Thymeleaf

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>

Thus, it's expecting thyme leaf related configuration for the spring boot public assets.

This post: https://stackoverflow.com/questions/41586841/thymeleaf-cssspringboot#answer-41590563, shows how to use Thymeleaf to set up the default Thymeleaf structure, and how to link the files in an HTML document. However, unfortunately, I did need to disable @EnableWebMVC. I will have to discover what major changes in my project are a result of this.

> <link href="../static/css/Layout.css" th:href="@{/css/Layout.css}" rel="stylesheet" />