Failed to load mods: Error while running setup for entity prototype "basic-wall" (wall): next_upgrade target (stone-wall) must have the same collision mask.

Heya,

Can you let me know what other mods you have installed? As this most likely the reason.

Cheers

quite a lot but if i disable "Dectorio" i don't get the error

quite a lot but if i disable "Dectorio" i don't get the error

There might be more to this; I ran the mod with Dectorio without issue. So some combination of mods with F+ and Dectorio are interfering with how walls upgrading works.

I did update the walls to not block shotgun pellets, I could in the future put a blanket update to search for any other mod walls and fix them up to the same collision mask.

Seems to be "Alien Biomes" for me, an optional dependency of Dectorio. (Tested with base 2.0.66, Alien Biomes 0.7.4, Dectorio 0.13.1, Factorio+ 2.4.1)

Either Alien Biomes or Dectorio loads with Factorio+, but not both at the same time.

Turning off Dectorio's walls/gates (startup mod setting) does work, at the cost of removing all of those walls from the world.
(Only other startup settings changed in either mod are Factorio+'s QoL: Status Panels "ALL", and Dectorio's Landscaping and Waterfill disabled.)

No more error as of 2.4.2