I think one have problem with AJAX because use TLP Portfolio Pro the other is a category or blog.
The page is empty, your server is not responding with any content so no Ajax is happening at all.
A white page normally means that a PHP error is happening on the server (in weeblrAMP or another plugin). You should search your server PHP error log for any error happening, that should give a clue as to which plugin might be erroring out.
Alternatively, you can also:
1 - in your wp-config.php file, set
Error messages should now be displayed on screen. note this may or may not work depending on your specific server configuration.
2 - In weeblrAMP configuration, on the "Comments and plugins" tab, disable one by one all plugins running on your site for AMP pages. This may give an information on which plugin is failing. See this page of the documentation for more details and screenshots