Add README warning and fix test erroneous syntax

README.md

@@ -6,6 +6,9 @@
 [![Tests | Linting | Publishing](https://github.com/sparkmicro/Ki-nTree/actions/workflows/test_deploy.yaml/badge.svg)](https://github.com/sparkmicro/Ki-nTree/actions)
 [![Coverage Status](https://coveralls.io/repos/github/sparkmicro/Ki-nTree/badge.svg?branch=main&service=github)](https://coveralls.io/github/sparkmicro/Ki-nTree?branch=main)
 
+## :warning: InvenTree Compatibility
+Ki-nTree currently only supports InvenTree `0.11` or older versions. InvenTree `0.12` introduced a new parameter template system which is not supported as of now, see https://github.com/sparkmicro/Ki-nTree/issues/165 for more details. The future versions of InvenTree (`0.13` and up) should be compatible with Ki-nTree again soon, and this page will be updated with the required InvenTree setup.
+
 ## :fast_forward: [Demo Video](https://youtu.be/YeWBqOCb4pw)
 
 <img src="https://raw.githubusercontent.com/sparkmicro/Ki-nTree/main/images/doc/kintree_v1_example.png" width="auto" height="auto">

run_tests.py

@@ -463,7 +463,7 @@ def check_result(status: str, new_part: bool) -> bool:
                 elif method_idx == 14:
                     # Reload categories from file
                     cat_from_file = inventree_interface.build_category_tree(reload=False)
-                    if isinstance(cat_from_file, list):
+                    if isinstance(cat_from_file, type(list)):
                         print(f'{type(cat_from_file)} != list')
                         method_success = False