The index.php file is the fallback template file when no other templates have been found. For a FSE theme this should never be run except when Gutenberg is not activated.
<?php
// Apparently this can be empty.
_e( 'Activate Gutenberg to use the "This is" theme', 'thisis');
?>
<?php
_e( 'You also need an index.html file in block-templates', 'thisis');
#fse-outreach-experiment #unanswered 18 agencies answers better blocks bug call #5 capabilities child theme color contributors could-do-better CSS custom customizer custom template dates development display:flex display:grid Dot empty featured image filter filters FREE GDPR global-styles grid Gutenberg handbook inline keyboard look and feel margin margins Mega Meetup menus migration mkaz navigation news nightly padding page builder paragraph performance phases plans plugins poem post edit post formats privacy process Publish query quote requirements reusable reusable block scope search server shortcode shortcuts Site Editor site icon size sort SSR stages statistics table template-part template parts templates theme.json themers Universal WooCommerce WordCamp Europe
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