'Support all Font Size values' setting cannot be used with an empty Font Sizes configuration.

When I add just a list of numbers, I get

Warning: Undefined array key 1 in Drupal\ckeditor_font\Plugin\CKEditor5Plugin\Font::generateFontSetting() (line 323 of modules/contrib/ckeditor_font/src/Plugin/CKEditor5Plugin/Font.php).

Drupal\ckeditor_font\Plugin\CKEditor5Plugin\Font::generateFontSetting('6
9
12
16
24
32
48
64', 'size') (Line: 184)

I'm having the same issue. I cannot add any font sizes. I've tried the following formats without the ordered list (of course):

• 10px|10px 10
• 10px|10 10
• 10px|10
• 10px|10 Ten

I get the same error every time even though I have toggled on "Support all Font Size values" or not:

'Support all Font Size values' setting cannot be used with non-numeric Font Sizes configuration.

Did somebody got this solved?