Getting 404 Not Found Right After The Loading Screen

[Nezzst]

Using the latest windows release, right after the loading screen the error I have described in the title and below appears.

Message: Something horribly went wrong.
Error: FormatException: Unexpected character (at character 4)
404: Not Found
^

Stack trace:
#0 _ChunkedJsonParser.fail (dart:convert-patch/convert_patch.dart:1405)
#1 _ChunkedJsonParser.parse (dart:convert-patch/convert_patch.dart:892)
#2 _parseJson (dart:convert-patch/convert_patch.dart:40)
#3 JsonDecoder.convert (dart:convert/json.dart:612)
#4 JsonCodec.decode (dart:convert/json.dart:216)
#5 ExtensionsManager._loadStore (package:yukino_app/modules/extensions/extensions.dart:79)

#6 ExtensionsManager.initialize (package:yukino_app/modules/extensions/extensions.dart:34)

#7 AppLifecycle.initialize (package:yukino_app/modules/app/lifecycle.dart:112)

#8 _PageState.initState. (package:yukino_app/ui/pages/stacked_home_page/splash_page.dart:42)

#9 HooksState.markReady (package:yukino_app/modules/state/hooks.dart:14)

[zyrouge]

It was caused due to merging the new extensions system. The current app is currently not capable of working with it as if now.