diff --git a/gns3server/controller/project.py b/gns3server/controller/project.py
index 98597649d..7cdec6022 100644
--- a/gns3server/controller/project.py
+++ b/gns3server/controller/project.py
@@ -15,7 +15,6 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-import sys
 import re
 import os
 import json
@@ -30,6 +29,7 @@ import zipfile
 import pathlib
 
 from uuid import UUID, uuid4
+from fastapi import HTTPException, status
 
 from .node import Node
 from .compute import ComputeError
@@ -837,7 +837,11 @@ class Project:
             log.warning(f"Closing project '{self.name}' ignored because it is being loaded")
             return
         self._closing = True
-        await self.stop_all()
+        try:
+            await self.stop_all()
+        except HTTPException as e:
+            if not e.status_code == status.HTTP_405_METHOD_NOT_ALLOWED:
+                raise
         for compute in list(self._project_created_on_compute):
             try:
                 await compute.post(f"/projects/{self._id}/close", dont_connect=True)