HTMLPurifier Serializer Error
July 9, 2016
Warning: Base directory htmlpurifier/library/HTMLPurifier/DefinitionCache/Serializer does not exist, please create or change using %Cache.SerializerPath in htmlpurifier/library/HTMLPurifier/DefinitionCache/Serializer.php on line XXX
Create the directory "Serializer" located at "htmlpurifier/library/HTMLPurifier/DefinitionCache/" and make sure it is server writeable.
cd htmlpurifier/standalone/HTMLPurifier/ mkdir -p DefinitionCache/Serializer
If you're using a git you might want to add the directory to your repository.
The .gitignore file located at HTMLPurifier/ is set to ignore everything in the "htmlpurifier/library/HTMLPurifier/DefinitionCache/" directory, and may cause the Serializer directory itself not to be created.
More info about Cache.SerializerPath http://htmlpurifier.org/live/configdoc/plain.html#Cache.SerializerPath
Written By Dillon