PHP Fatal Error

Getting a fatal error below

[04-Sep-2023 15:04:23 UTC] PHP Fatal error: Uncaught TypeError: Cannot access offset of type string on string in /sites/example.com/files/wp-content/plugins/kirki/kirki-packages/module-webfonts/src/Webfonts/Downloader.php:99

Stack trace:

#0 /sites/example.com/files/wp-content/plugins/kirki/kirki-packages/module-webfonts/src/Webfonts/Downloader.php(44): Kirki\Module\Webfonts\Downloader->get_local_files_from_css()

#1 /sites/example.com/files/wp-content/plugins/kirki/kirki-packages/module-webfonts/src/Webfonts/Downloader.php(32): Kirki\Module\Webfonts\Downloader->get_local_font_styles()

#2 /sites/example.com/files/wp-content/plugins/kirki/kirki-packages/module-webfonts/src/Webfonts/Embed.php(154): Kirki\Module\Webfonts\Downloader->get_styles()

#3 /sites/example.com/files/wp-includes/class-wp-hook.php(310): Kirki\Module\Webfonts\Embed->the_css()

#4 /sites/example.com/files/wp-includes/class-wp-hook.php(334): WP_Hook->apply_filters()

#5 /sites/example.com/files/wp-includes/plugin.php(517): WP_Hook->do_action()

#6 /sites/example.com/files/wp-content/plugins/kirki/kirki-packages/module-css/src/CSS.php(337): do_action()

#7 /sites/example.com/files/wp-content/plugins/kirki/kirki-packages/module-css/src/CSS.php(202): Kirki\Module\CSS->print_styles()

#8 /sites/example.com/files/wp-includes/class-wp-hook.php(310): Kirki\Module\CSS->print_styles_inline()

#9 /sites/example.com/files/wp-includes/class-wp-hook.php(334): WP_Hook->apply_filters()

#10 /sites/example.com/files/wp-includes/plugin.php(517): WP_Hook->do_action()

#11 /sites/example.com/files/wp-includes/general-template.php(3053): do_action()

#12 /sites/example.com/files/wp-content/themes/restoration/header.php(36): wp_head()

#13 /sites/example.com/files/wp-includes/template.php(785): require_once('...')

#14 /sites/example.com/files/wp-includes/template.php(720): load_template()

#15 /sites/example.com/files/wp-includes/general-template.php(48): locate_template()

#16 /sites/example.com/files/wp-content/themes/restoration/page.php(11): get_header()

#17 /sites/example.com/files/wp-includes/template-loader.php(106): include('...')

#18 /sites/example.com/files/wp-blog-header.php(19): require_once('...')

#19 /sites/example.com/files/index.php(17): require('...')

#20 {main}

thrown in /sites/example.com/files/wp-content/plugins/kirki/kirki-packages/module-webfonts/src/Webfonts/Downloader.php on line 99