# Problem with anki, need help please

**URL:** <https://forums.ankiweb.net/t/problem-with-anki-need-help-please/8915>\
**Category:** Help\
**Created:** [April 1, 2021, 7:48pm UTC](https://forums.ankiweb.net/t/problem-with-anki-need-help-please/8915 "2021-04-01T19:48:12Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![juan123](https://avatars.discourse-cdn.com/v4/letter/j/ce7236/32.png) [@juan123](https://forums.ankiweb.net/u/juan123)\
**Post date:** [April 1, 2021, 7:48pm UTC](https://forums.ankiweb.net/t/problem-with-anki-need-help-please/8915/1 "2021-04-01T19:48:12Z")

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**I have this issue that i don’t know how to solve, each time i try to open anki it shows this:**

Anki was unable to open your collection file. If problems persist after restarting your computer, please use the Open Backup button in the profile manager.

Debug info:  
Traceback (most recent call last):  
File “aqt/main.py”, line 441, in loadCollection  
File “aqt/main.py”, line 467, in \_loadCollection  
File “aqt/main.py”, line 588, in moveToState  
File “aqt/main.py”, line 595, in \_deckBrowserState  
File “aqt/deckbrowser.py”, line 54, in show  
File “aqt/deckbrowser.py”, line 110, in \_renderPage  
File “aqt/deckbrowser.py”, line 117, in \_\_renderPage  
File “\</Applications/Anki.app/Contents/MacOS/decorator.pyc:decorator-gen-6\>”, line 2, in renderStats  
File “anki/hooks.py”, line 666, in decorator\_wrapper  
File “anki/hooks.py”, line 663, in repl  
File “/Users/admin/Library/Application Support/Anki2/addons21/1556734708/mds\_time\_left.py”, line 71, in renderStats  
+ \_old(self) + “

* * *
”   
File “/Users/admin/Library/Application Support/Anki2/addons21/1421528223/ **init**.py”, line 9, in renderStats  
nodes = self.mw.col.sched.deck\_due\_tree().children  
AttributeError: ‘Scheduler’ object has no attribute ‘deck\_due\_tree’

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**Author:** ![juan123](https://avatars.discourse-cdn.com/v4/letter/j/ce7236/32.png) [@juan123](https://forums.ankiweb.net/u/juan123)\
**Post date:** [April 1, 2021, 7:48pm UTC](https://forums.ankiweb.net/t/problem-with-anki-need-help-please/8915/2 "2021-04-01T19:48:51Z")

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(i HAVE ANKI VERSION 2.1.23)

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**Author:** ![zhushenli](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.ankiweb.net/zhushenli/32/3691_2.png) [@zhushenli](https://forums.ankiweb.net/u/zhushenli)\
**Post date:** [April 1, 2021, 9:33pm UTC](https://forums.ankiweb.net/t/problem-with-anki-need-help-please/8915/3 "2021-04-01T21:33:57Z")

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1. update Anki to latest version.
2. If problem still exists, report to add-on author.

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**Author:** ![system](https://us1.discourse-cdn.com/flex002/uploads/anki2/original/1X/8f1279ababc5879d54e4838989f606cfe55af8c7.jpeg) [@system](https://forums.ankiweb.net/u/system)\
**Post date:** [May 1, 2023, 5:08am UTC](https://forums.ankiweb.net/t/problem-with-anki-need-help-please/8915/4 "2023-05-01T05:08:52Z")

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