diff --git a/wallman/wallman_lib.py b/wallman/wallman_lib.py
index 2a2b030..289f7ea 100644
--- a/wallman/wallman_lib.py
+++ b/wallman/wallman_lib.py
@@ -24,7 +24,17 @@ class _Config:
             logger.critical("The general dictionary was not found or contains errors")
             print("CRITICAL: The general dictionary was not found or contains errors")
             raise ConfigError("The general dictionary was not found or contains errors")
-        # Changing times
+        if not self._validate_fallback_wallpaper():
+            print("ERROR: Cannot use a fallback wallpaper: Incorrect type.")
+            logger.error("Cannot use a fallback wallpaper: Incorrect type.")
+        else:
+            logger.debug("Will use a fallback wallpaper")
+        if not self._validate_types():
+            logger.critical("Wallman encountered incompatible types in critical variables. exiting.")
+            print("CRITICAL: Wallman encountered incompatible types in critical variables. exiting.")
+            raise ConfigError("Wallman encountered incompatible types in critical variables.")
+        else:
+            logger.debug("All critical types match the required type.")
         self.use_fallback_wallpaper: bool = self._validate_fallback_wallpaper():
         if not self.use_fallback_wallpaper:
             logger.warning("No fallback wallpaper will be used.")
@@ -354,7 +364,22 @@ class _Config:
             logger.debug("used_sets is a list of strings.")
         # systray
         if not isinstance(self.config_systray, bool):
-            logger.error("")
+            logger.error("The type of systray in the config is not a bool. Defaulting to true.")
+            print("ERROR: The type of systray in the config is not a bool. Defaulting to true.")
+        else:
+            print("The type of systray in the config is correct.")
+        # Wallpaper behavior
+        if not isinstance(self.config_behavior, str):
+            print("ERROR: The type of behavior in the config file is not str. Defaulting to fill.")
+            logger.error("The type of behavior in the config file is not str. Defaulting to fill.")
+        else:
+            logger.debug("The type of behavior in the config file is str.")
+        # notifications
+        if not isinstance(self.config_notify, bool):
+            logger.error("The type of notify in the config is not bool, defaulting to False")
+            print("ERROR: The type of notify in the config is not bool, defaulting to False")
+        else:
+            logger.debug("The type of notify in the config is bool.")