diff --git a/openpype/hosts/fusion/hooks/pre_fusion_setup.py b/openpype/hosts/fusion/hooks/pre_fusion_setup.py
index a0c16a6700..8c4973cf43 100644
--- a/openpype/hosts/fusion/hooks/pre_fusion_setup.py
+++ b/openpype/hosts/fusion/hooks/pre_fusion_setup.py
@@ -1,6 +1,6 @@
 import os
 import importlib
-from openpype.lib import PreLaunchHook
+from openpype.lib import PreLaunchHook, ApplicationLaunchFailed
 from openpype.hosts.fusion.api import utils
 
 
@@ -14,25 +14,27 @@ class FusionPrelaunch(PreLaunchHook):
     def execute(self):
         # making sure pyton 3.6 is installed at provided path
         py36_dir = os.path.normpath(self.launch_context.env.get("PYTHON36", ""))
-        assert os.path.isdir(py36_dir), (
-            "Python 3.6 is not installed at the provided folder path. Either "
-            "make sure the `environments\resolve.json` is having correctly "
-            "set `PYTHON36` or make sure Python 3.6 is installed "
-            f"in given path. \nPYTHON36E: `{py36_dir}`"
-        )
-        self.log.info(f"Path to Fusion Python folder: `{py36_dir}`...")
+        if not os.path.isdir(py36_dir):
+            raise ApplicationLaunchFailed(
+                "Python 3.6 is not installed at the provided path.\n"
+                "Either make sure the 'environments/fusion.json' has "
+                "'PYTHON36' set corectly or make sure Python 3.6 is installed "
+                f"in the given path.\n\nPYTHON36: {py36_dir}"
+            )
+        self.log.info(f"Path to Fusion Python folder: '{py36_dir}'...")
         self.launch_context.env["PYTHON36"] = py36_dir
 
         # setting utility scripts dir for scripts syncing
         us_dir = os.path.normpath(
             self.launch_context.env.get("FUSION_UTILITY_SCRIPTS_DIR", "")
         )
-        assert os.path.isdir(us_dir), (
-            "Fusion utility script dir does not exists. Either make sure "
-            "the `environments\fusion.json` is having correctly set "
-            "`FUSION_UTILITY_SCRIPTS_DIR` or reinstall DaVinci Resolve. \n"
-            f"FUSION_UTILITY_SCRIPTS_DIR: `{us_dir}`"
-        )
+        if not os.path.isdir(us_dir):
+            raise ApplicationLaunchFailed(
+                "Fusion utility script dir does not exist. Either make sure "
+                "the 'environments/fusion.json' has "
+                "'FUSION_UTILITY_SCRIPTS_DIR' set correctly or reinstall "
+                f"Fusion.\n\nFUSION_UTILITY_SCRIPTS_DIR: '{us_dir}'"
+            )
 
         try:
             __import__("avalon.fusion")