This has been an ongoing issue for me since phase 5 of SoD dropped. Whenever I open the fullscreen version of the map more than once, other in-game interfaces will no longer function properly. This includes mail, the spellbook, vendors, and player trading; it possibly includes other functions as well that I haven’t encountered yet. What specifically happens is that I will hear the relevant interface open, but it will not appear on my screen. I can temporarily fix this by reloading my ui, but this only lasts until I need to open the map again.
As best I can tell, this is an issue with the game’s ui scaling feature. Per the advice of others, I removed all addons and reinstalled the game, only to find that the issue is still present whenever I enable ui scaling - the map works fine with it disabled. Unfortunately, due to low vision, I have to play the game with scaling enabled to be able to comfortably read in-game text and interact with the ui.