Fishbringer reliably throws a Lua error when entering the Deeprun Tram zone. Here's the text of the error:

Message: Interface/AddOns/Fishbringer/fishy.lua:241: Usage: local info = C_Map.GetMapInfo(uiMapID)
Time: Sat Apr 15 13:59:17 2023
Count: 1
Stack: Interface/AddOns/Fishbringer/fishy.lua:241: Usage: local info = C_Map.GetMapInfo(uiMapID)
[string "=[C]"]: in function GetMapInfo' [string "@Interface/AddOns/Fishbringer/fishy.lua"]:241: in function ?'
[string "@Interface/AddOns/Fishbringer/fishy.lua"]:537: in function <Interface/AddOns/Fishbringer/fishy.lua:536>

Locals: (*temporary) = nil