Yoast is a good seo plugin and I’m sure it works fine with bbpress. I had used bbpress in one of my projects and also installed yoast and it was working fine.
Hi Gunilla,
If you have still not resolved your problem, you need to edit your wp-config.php file which should be located in the root of your WordPress installation. You need to insert below mention code at the end of the file and then this error will disappear.
define( ‘WP_MEMORY_LIMIT’, ‘256M’ );
Source: https://www.webxen.com/kb/wordpress-fatal-error-allowed-memory-size-of-67108864-bytes-exhausted/
