Add "file nil" error message (#9022)

runtime/lua/xml.lua

@@ -101,6 +101,11 @@ function xml.LoadXMLFile(fileName)
 	end
 	local fileText = fileHnd:read("*a")
 	fileHnd:close()
+	if not fileText then
+		return nil, fileName.." file returns nil.  OneDrive?"
+	elseif fileText == "" then
+		return nil, fileName.." file is empty"
+	end
 	return xml.ParseXML(fileText)
 end
 

src/Modules/Main.lua

@@ -512,6 +512,11 @@ end
 
 function main:LoadSettings(ignoreBuild)
 	local setXML, errMsg = common.xml.LoadXMLFile(self.userPath.."Settings.xml")
+	if errMsg and not errMsg:match(".*No such file or directory") then
+		ConPrintf("Error: '%s'", errMsg)
+		launch:ShowErrMsg("^1"..errMsg)
+		return true
+	end
 	if not setXML then
 		return true
 	elseif setXML[1].elem ~= "PathOfBuilding" then
@@ -640,6 +645,11 @@ end
 
 function main:LoadSharedItems()
 	local setXML, errMsg = common.xml.LoadXMLFile(self.userPath.."Settings.xml")
+	if errMsg and not errMsg:match(".*No such file or directory") then
+		ConPrintf("Error: '%s'", errMsg)
+		launch:ShowErrMsg("^1"..errMsg)
+		return true
+	end
 	if not setXML then
 		return true
 	elseif setXML[1].elem ~= "PathOfBuilding" then