Preparing requested page loop, project won't display in browser

Preliminary Checks

• This issue is not a duplicate. Before opening a new issue, please search existing issues: https://github.com/gatsbyjs/gatsby/issues
• This issue is not a question, feature request, RFC, or anything other than a bug report directly related to Gatsby. Please post those things in GitHub Discussions: https://github.com/gatsbyjs/gatsby/discussions

Description

When running gatsby develop, no errors occur. However when opening localhost:8000 in the browser, it only shows a blank white page and a “Preparing requested page” message in the bottom left corner.

Link to what I’m seeing.

There’s also a console error:

app.js:178 Uncaught (in promise) TypeError: $RefreshSig$ is not a function
    at eval

Reproduction Link

https://github.com/ggs-landscaping/ggs

Steps to Reproduce

1. Run gatsby develop
2. Open browser

Expected Result

Expected to see the website project.

Actual Result

Shows a blank white page and a “Preparing requested page” message in the bottom left corner.

Environment

System:
    OS: Windows 10 10.0.19042
    CPU: (8) x64 Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz
  Binaries:
    Node: 14.15.4 - C:\Program Files\nodejs\node.EXE
    Yarn: 1.19.1 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
    npm: 6.14.10 - C:\Program Files\nodejs\npm.CMD
  Languages:
    Python: 2.7.15 - /c/Users/Jarryd/.windows-build-tools/python27/python  Browsers:
    Chrome: 95.0.4638.69
    Edge: Spartan (44.19041.1266.0), Chromium (95.0.1020.44)
  npmPackages:
    gatsby: ^3.14.5 => 3.14.5
    gatsby-plugin-google-analytics: ^2.6.0 => 2.11.0
    gatsby-plugin-google-fonts: ^1.0.1 => 1.0.1
    gatsby-plugin-html-attributes: ^1.0.5 => 1.0.5
    gatsby-plugin-preact: ^4.2.0 => 4.7.0
    gatsby-plugin-prefetch-google-fonts: ^1.4.3 => 1.4.3
    gatsby-plugin-preload-fonts: ^1.4.0 => 1.9.1
    gatsby-plugin-react-helmet: ^3.4.0 => 3.10.0
    gatsby-plugin-robots-txt: ^1.6.14 => 1.6.14
    gatsby-plugin-sass: ^2.5.1 => 2.8.0
    gatsby-plugin-sitemap: ^2.7.0 => 2.12.0
    gatsby-source-filesystem: ^2.6.0 => 2.11.1
  npmGlobalPackages:
    gatsby-cli: 2.15.0

Config Flags

No response

[nabilzouhir]

I was able to reproduce the error. To solve it I ran gatsby clean and then gatsby develop and it worked

[LekoArts]

Hi!

Since we didn’t receive an answer for 7 days or more about the ask of a reproduction I’m going to close this now, as we can’t do much to help without a reproduction. If you are able to create a minimal reproduction for this then please do answer here or open a new issue with a reproduction. Thanks!