This mod is incompatible because there's scripts in this mod that make false assumptions about the structure of a player.
For example, scripts/reviver.lua 46-47 reads:
local stack = player.cursor_stack
if stack.valid_for_read then
However, it is not necessarily the case that stack is not nil; in this case, PickerExtended will throw an error. This particular error can be fixed by replacing line 47 with the following:
if stack and stack.valid_for_read then
However, until and unless all such false assumptions leading to errors are fixed, PickerExtended is incompatible with Space Exploration.