[Plugin: 404 Redirected] Memory errors

Memory allocation is too small…
You can try changing this in wp-config.php
See this post about increasing memory limit (WordPress Codex)
Suggested memory limit is 128MB or 96MB minimum: (32MB is way too low and 64 is marginal.)

Add this line to wp-config.php file

define('WP_MEMORY_LIMIT', '128M');

(NOTE: backup your wp-config file first)
If this doesn’t work, and you are using shared hosting, your hosting service may not allow mods to memory allocation by clients – in which case you’ll need to ask them to do it for you.