Fatal error: Uncaught Error: count(): Argument #1 ($value) must be of type Countable|array, null given
in /Users/jiro/Local Sites/sanin-tanken/app/public/wp-content/themes/sanin-tanken/sp/tankenki-single.php on line 56

Call stack:

1. include_once()
   wp-content/themes/sanin-tanken/single-tankenki.php:9
2. include()
   wp-includes/template-loader.php:106
3. require_once()
   wp-blog-header.php:19
4. require()
   index.php:17