# An unexpected error occurred. Please try again later in "Survival Estimates that Vary with Time" Notebook submission

**URL:** <https://community.deeplearning.ai/t/an-unexpected-error-occurred-please-try-again-later-in-survival-estimates-that-vary-with-time-notebook-submission/892406>\
**Category:** AI for Medical Prognosis\
**Tags:** week-module-4, dl-ai-learning-platform\
**Created:** [May 23, 2026, 2:55pm UTC](https://community.deeplearning.ai/t/an-unexpected-error-occurred-please-try-again-later-in-survival-estimates-that-vary-with-time-notebook-submission/892406 "2026-05-23T14:55:13Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Tahir\_Yamin](https://sea1.discourse-cdn.com/dlai/user_avatar/community.deeplearning.ai/tahir_yamin/32/126556_2.png) [@Tahir\_Yamin](https://community.deeplearning.ai/u/Tahir_Yamin)\
**Post date:** [May 23, 2026, 2:55pm UTC](https://community.deeplearning.ai/t/an-unexpected-error-occurred-please-try-again-later-in-survival-estimates-that-vary-with-time-notebook-submission/892406/1 "2026-05-23T14:55:13Z")

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An unexpected error occurred. Please try again later in “Survival Estimates that Vary with Time” Notebook submission

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**Author:** ![omarWael](https://sea1.discourse-cdn.com/dlai/user_avatar/community.deeplearning.ai/omarwael/32/136263_2.png) [@omarWael](https://community.deeplearning.ai/u/omarWael)\
**Post date:** [May 23, 2026, 3:27pm UTC](https://community.deeplearning.ai/t/an-unexpected-error-occurred-please-try-again-later-in-survival-estimates-that-vary-with-time-notebook-submission/892406/2 "2026-05-23T15:27:46Z")

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hi @Tahir_Yamin

welcome to the community 🎉

this unexpected error during submission is usually a temporary issue with the coursera platform servers and not a problem with your code logic

i see you can try a few simple steps to fix this

first you can try to clear your browser cache or open the course in an incognito window and submit again sometimes it works

second make sure that your notebook file size is not too large , fix it by deleting any extra print statements or long error outputs you added , then save the file and try submitting

if it still fails you can go to the lab menu click reboot server or refresh workspace to get a fresh connection to the grader

let us know if it works after trying these steps

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<div class="post-metadata">

**Author:** ![Deepti\_Prasad](https://sea1.discourse-cdn.com/dlai/user_avatar/community.deeplearning.ai/deepti_prasad/32/165831_2.png) [@Deepti\_Prasad](https://community.deeplearning.ai/u/Deepti_Prasad)\
**Post date:** [May 23, 2026, 6:46pm UTC](https://community.deeplearning.ai/t/an-unexpected-error-occurred-please-try-again-later-in-survival-estimates-that-vary-with-time-notebook-submission/892406/3 "2026-05-23T18:46:26Z")

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@Tahir_Yamin

can you post screenshot of submission grader which provides info for each exercise why it failed.

Also confirm, in the notebook if you passed all the test.

Remember doing any editing, deleting outside markers such as ###Start and end code here###, can also lead to failed submission.

You haven’t provided much information on what measures you took to resolve this issue.