The kata failed to load. Please try reloading the page.

[copperwye]

Describe the bug

For for four days now, I get for every Python kata that I try to train on the message: "The kata failed to load. Please try reloading the page.". I tried chrome and firefox browser as well as different Windows 10 Computer. All with the same negative effect.

To Reproduce

Load untrained Python kata and press the >TRAIN button.

Expected Behavior

Open the kata in train mode.

Screenshots

Contexts

Please complete the following information:

• Codewars username: CopperWye
• OS: Win10
• Browser: Chrome: 78.0.3904.97 and Firefox 70.0.1
• Browser Version: see above

[kazk]

Can you try after clearing cookies and disabling any extensions?

For for four days now, I get for every Python kata that I try to train on the message: "The kata failed to load. Please try reloading the page.".

Looks like you were able to submit solution for Data mining #2 2 days ago. Did you do anything different?

Do you see anything in console?

[copperwye]

The Data mining #2 kata was already opened in training mode a few days before.
Clearing the cache did not have any effect.
After your suggestion, I found this with the browser developer tools:

Request URL: https://www.codewars.com/users/notifications/unread_popups
Request Method: POST
Status Code: 200
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date: Wed, 13 Nov 2019 03:46:26 GMT
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origin: https://www.codewars.com
referer: https://www.codewars.com/kata/simple-interactive-interpreter/train/python
sec-fetch-mode: cors
sec-fetch-site: same-origin
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x-requested-with: XMLHttpRequest
href: https://www.codewars.com/kata/simple-interactive-interpreter/train/python
data[controllerName]: code_challenges
data[errors][0][reason]: Strategy invalid value
data[errors][0][fields][]: strategy

[kazk]

Thanks. I think I found the cause.

To confirm, can you try changing the strategy on the dashboard ("Fundamentals" in the following screenshot) and try loading some challenge?

[kazk]

Deployed the fix. Please let me know if this continues to happen.

[copperwye]

Your suggestion and the fix worked. I can go to training again :-)
Thank you @kazk!