Loader::get_assets_context() throws a fatal error if get_current_screen returns null

[raphcollective]

Version

• Carbon Fields: 3.1
• WordPress: 5.5
• PHP: 7.4

Issue

Loader::get_assets_context() assumes that get_current_screen return value is never null. get_current_screen can return a null value and because is_block_editor() is called directly, it results in the function throwing a fatal error.

It creates incompatibilities with the TD Composer plugin (for the theme Newspaper).

This can be easily solved by verifying the return of get_current_screen and returning 'classic' by default if it returns null.