Keep Getting this error

Error
An error occurred. Please start Anki while holding down the shift key, which will temporarily disable the add-ons you have installed.
If the issue only occurs when add-ons are enabled, please use the Tools > Add-ons menu item to disable some add-ons and restart Anki, repeating until you discover the add-on that is causing the problem.
When you’ve discovered the add-on that is causing the problem, please report the issue on the add-on support site.
Debug info:
Anki 2.1.40 (cf446733) Python 3.8.6 Qt 5.14.2 PyQt 5.14.2
Platform: Windows 10
Flags: frz=True ao=True sv=2
Add-ons, last update check: 2021-05-28 18:01:39

Caught exception:
Traceback (most recent call last):
File “aqt\progress.py”, line 52, in handler
File “aqt\browser.py”, line 1066, in deferredDisplay
File “C:\Users\Abdi Sid Surface\AppData\Roaming\Anki2\addons21\564851917\main.py”, line 54, in replace_buildTree
favTree(self,root)
File “C:\Users\Abdi Sid Surface\AppData\Roaming\Anki2\addons21\564851917\tree.py”, line 75, in favTree
exp = tree.node_state.get(type).get(leaf_tag,False)
AttributeError: ‘NewSidebarTreeView’ object has no attribute ‘node_state’

That is the (Legacy) Blitzkrieg II - Advanced Browser Sidebar [BETA8] - AnkiWeb right?
it have been integrated in 2.1.40+
image

It has been confirmed the features in this addon will be integrated in to future versions of Anki without the need of addons. Some essential features such as renames have already been added. To avoid duplicate efforts, this addon will not be updated for the time being.

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