Describe the bug
When logged into the admin interface, we get an error shown at the top

To Reproduce

• Checkout https://github.com/xbmc/kodi-tv/tree/main
• Run npm i
• Run npm start
• Goto http://localhost:8000/admin/#/
• You should see an error - there also are errors in the start console

 WARNING  Compiled with 1 warning                                                                                                                                        
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 warning  in ./node_modules/gatsby-plugin-decap-cms/gatsby-browser.js
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Expected behavior
Shouldn't show the error - sub pages get broken and also show the header in the middle of the page

Screenshots

Applicable Versions:

• Decap CMS version: decap-cms-app@3.1.1
• Git provider: github
• Browser version: Mozilla/5.0 (X11; Linux x86_64; rv:122.0) Gecko/20100101 Firefox/122.0

CMS configuration

https://github.com/xbmc/kodi-tv/blob/main/static/admin/config.yml
...