Thread:Extension talk:LiquidThreads/Internal error for Special:NewMessages/reply

It's a change in the code relating to MW 1.23 that brought about the error:

https://git.wikimedia.org/commitdiff/mediawiki%2Fextensions%2FLiquidThreads/3680e12bd1cd5372c6a57abbc2b03800bfc1bee4

Restoring getPageTitle to getTitle (deprecated in MW 1.23 but still used in MW 1.22) solved things.