Feels a bit like a déjà-vu. ??
After I updated to WP 4.1.9 yesterday, Default Post Date started throwing a fatal error:
PHP Fatal error: Call to undefined method Composer\Autoload\ClassLoader::setClassMapAuthoritative() in /wp-content/plugins/default-post-date/vendor/composer/autoload_real.php on line 41
I have, again, reverted to the last stable version (1.4.1) for now, which continues to work fine for me.
]]>Until and including version 1.4.1, Default Post Date worked just fine with my WP 4.1.8 installation.
Upon updating to version 1.5.0 I got a WSOD. In debug mode a Fatal Error message was shown telling me some file or other belonging to Default Post Date could not be found.
I reverted to the previous version for now.
]]>