Same issue here, i didn't notice because i dont use the plugin actually (but still is installed, just in case ).
Everything up2date, also, Martynas, if you want you can access my server in order to investigate.
Regards
It's strange, /usr/local/directadmin/plugins/custombuild/admin/build file didn't have correct permissions set. The following commands fixed it:
Code:
chown root:admin /usr/local/directadmin/plugins/custombuild/admin/build
chmod 4755 /usr/local/directadmin/plugins/custombuild/admin/build