add exception handler in case preload breaks?

Signed-off-by: Victor Seiji Hariki <victorseijih@gmail.com>

preload.py

@@ -3,3 +3,4 @@ import argparse
 def preload(parser: argparse.ArgumentParser):
         parser.add_argument("--lock-oo-submodule", action='store_true',
                         help="(openOutpaint-webUI-extension) Prevent checking for main openOutpaint submodule updates.")
+        

scripts/main.py

@@ -49,11 +49,21 @@ def started(demo, app: FastAPI):
         pass
 
 
-def add_tab():
-    if (not shared.cmd_opts.lock_oo_submodule):
+def update_app():
     git = os.environ.get('GIT', "git")
     run(f'"{git}" -C "' + scripts.basedir() +
         '" submodule update --init --recursive --remote')
+
+
+def add_tab():
+    try:
+        if shared.cmd_opts.lock_oo_submodule:
+            print(f"[openOutpaint] Submodule locked. Will skip submodule update.")
+        else:
+            update_app()
+    except Exception:
+        update_app()
+
     with gr.Blocks(analytics_enabled=False) as ui:
         #refresh = gr.Button(value="refresh", variant="primary")
         canvas = gr.HTML(