Fatal error for category archives

Question

When entering the blog and clicking on any of the categories, an error appears.

There was a fatal error with this site.

Learn more about WordPress troubleshooting.

When using the query monitor tool, I encountered an error

There was a fatal error with this site.

Learn more about WordPress troubleshooting.

I discovered that when the template is changed, the problem is solved and the categories work.

Answer 1

for make sure about the problems, would you like to show us about the errors by adding below code in your wp-config.php

define( 'WP_DEBUG', true );
define( 'WP_DEBUG_LOG', true );
define( 'WP_DEBUG_DISPLAY', true );

be better if you give web console message to when accessed the error category/url.