After pulling the master repo I'm now getting the following message when I click on the members area of the admin section.
"The Sub-action you requested is not defined"
Confirmed, only happens when selecting it from the ACP .. thanks for the report!
ETA: https://github.com/Spuds/Elkarte/commit/1b5f9ddc89068fd41fa1481e5c3ba2c5f2ae7629
Could it be for the sa=all?