only Manual is supported in insecure mode

api/tacticalrmm/agents/views.py

@@ -570,6 +570,14 @@ def install_agent(request):
     from agents.utils import get_agent_url
     from core.utils import token_is_valid
 
+    if getattr(settings, "TRMM_INSECURE", False) and request.data["installMethod"] in {
+        "exe",
+        "powershell",
+    }:
+        return notify_error(
+            "Not available in insecure mode. Please use the 'Manual' method."
+        )
+
     # TODO rework this ghetto validation hack
     # https://github.com/amidaware/tacticalrmm/issues/1461
     try: