Missing wp-includes/css/classic-themes.min.css stylesheet

[bilalmughl]

Bug Report

Description

A warning is being displayed when adding new pattren using Hello Elementor 3.0.1 Theme.
Warning: file_get_contents(/wordpress/wp-includes/css/classic-themes.min.css): Failed to open stream: The specified file or directory does not exist in /wordpress/wp-includes/script-loader.php on line 14
Warning: Cannot modify header information - headers already sent by (output started at /wordpress/wp-includes/script-loader.php:14)

Environment

• WordPress: 6.5-beta1
• PHP: 8.0.30-dev
• Server: PHP.wasm
• Database: WP_SQLite_Translator (Server: 5.5 / Client: 3.40.1)
• Browser: Chrome 121.0.0.0
• OS: Windows 10/11
• Theme: Hello Elementor 3.0.1
• MU Plugins:
  • 0-playground.php
  • 0-sqlite.php
  • WordPress WXZ Exporter 0.1
• Plugins:
  • Create Block Theme 1.13.8
  • Debug Bar 1.1.4
  • Health Check & Troubleshooting 1.7.0
  • Test Reports 1.1.0
  • User Switching 1.7.2
  • WordPress Importer Git loader 0.8.2

Steps to Reproduce

2. 🐞 Bug occurs.

Expected Results

1. ✅ The new pattern should be added without any warnings.

Actual Results

1. ❌ Warnings are displayed:

Warning: file_get_contents(/wordpress/wp-includes/css/classic-themes.min.css): Failed to open stream: The specified file or directory does not exist in /wordpress/wp-includes/script-loader.php on line 14
Warning: Cannot modify header information - headers already sent by (output started at /wordpress/wp-includes/script-loader.php:14)

Additional Notes

• This issue occurs when using Hello Elementor 3.0.1 Theme while attempting to add a new pattern.

Supplemental Artifacts

Screenshot:
​https://take.ms/Ca9Rv
Video:
​https://take.ms/QP6Yd

[swissspidy]

I just downloaded WordPress 6.5 Beta 1 from ​https://wordpress.org/news/2024/02/wordpress-6-5-beta-1/ and the wp-includes/css/classic-themes.min.css file definitely does exist. So this seems like an issue with Playground.

[bilalmughl]

The problem occurred during testing on Playground.