how to find out source of error
 

i have alot addons
in chat i often see this

[10:47:22] WARN: Icon path empty for quest pin type [21] and assisted [false] with text: Enter Vanus Galerion's Portal


or similar with other quests while questing

its not Map Pins or Quest Map, tested:confused:

Use the tool Notepad++ (it's free) and open it, use the menu "Search" -> "Find in files".
Point it to your addOns directory.
And then search for the string like "WARN" or something else form the message.
maybe you'll find the file where it comes from this way.

Are you running FasterTravel version 2.1.2?