blank page after posting

Using APC and when i click on publish it just goes to /post.php and it’s a blank page. The post does post.

also, when it auto saves the publish button and save draft button dont work (can’t press them)

using apache 2.2.22

my apc settings
apc.enabled=1
apc.shm_segments=1
apc.shm_size=512M
apc.num_files_hint=20000
apc.user_entries_hint=20000
apc.ttl=7200
apc.user_ttl=7200
apc.gc_ttl=3600
apc.stat=1
apc.include_once_override=0
apc.enable_cli=0
apc.file_update_protection=2
apc.max_file_size=5M
apc.cache_by_default=1

https://www.ads-software.com/plugins/wp-ffpc/