Yesterday, I phased in the SpriteSheet extension on my wiki so that my geofictional endeavours could take advantage of its slicing features; that much I stated in my latest FTA. Testing began last night with this coastline map of Rogatia, a realm in the North Atlantic where part of a forthcoming book series of mine is set (and the end result of 15 years of protracted R&D); row and column values were set to 7 (across a 2800 × 2100 px field resulting in 400 × 300 px portions). Nothing happened after a few minutes, so before I slept away last night, I decided to switch to a raster version but couldn't afford to stay awake for the end result. Resuming almost immediately this morning, selecting "Save Sheet" leads to no output either; the spinner in the centre goes on and on.

SpriteSheet, despite being on at least a couple of other wikis, has nonexistent documentation/demos on Miraheze--and this episode is adding to the dearth when it shouldn't. (Not to mention its latest MW.org talk-page message was posted in October 2019.) Wonder what's causing it not to work in MW 1.39?

Second in this month's series of post-MW-version-upgrade bug reports filed by this contributor. Tomorrow, an investigation into lack of image or auto-redirect recognition in the "From the Author" namespace.