UI Error
 

I've been using MM for a few weeks now without any issues until today. On startup I get the following UI Error:
user:/AddOns/MasterMerchant/MasterMerchant.lua:1671: table index is nil
stack traceback:
user:/AddOns/MasterMerchant/MasterMerchant.lua:1671: in function 'MasterMerchant:InitPurchaseHistory'
user:/AddOns/MasterMerchant/MasterMerchant.lua:1656: in function 'MasterMerchant:TruncateHistory'
user:/AddOns/MasterMerchant/MasterMerchant.lua:1463: in function 'MasterMerchant:Initialize'
user:/AddOns/MasterMerchant/MasterMerchant.lua:1894: in function 'OnAddOnLoaded'

I've restarted Elder Scrolls and completely re-installed MM. I've also disabled all addons with the exception of MM and still get the same result.

You could try to rename/delete your old master merchant saved variables file. But you need to setup the addon new afterwards and the information about sales etc. maybe gone then.

You'll find it at: c:\users\<your windows username>\documents\Elder Scrolls Online\live (or liveeu if you playo n the EU servers)\SavedVariables

There should be some file called MM*settings or MasterMerchant*.