Thread:Extension talk:PageAttachment/invalid PageAttachment internal cache type specified: MySQL/reply

Please see the documentation on "internal cache" setup at the following link:

https://code.google.com/p/mediawiki-page-attachment/wiki/PageAttachmentsInternalCachePage

For complete cache setup options, see the following link:

https://code.google.com/p/mediawiki-page-attachment/wiki/Cache

If you still have questions or getting errors then let me know.