Reset error message list in settings loader

src/corelibs/config_handling/settings_loader.py

@@ -90,6 +90,8 @@ class SettingsLoader:
         Returns:
             dict[str, str]: key = value list
         """
+        # reset error message list before run
+        self.__error_msg = []
         # default set entries
         entry_set_empty: dict[str, str | None] = {}
         # entries that have to be split