Cannot read properties of null (reading 'getItem')

kevintab95 commented 2 years ago

This error occurred recently in production

TypeError: Cannot read properties of null (reading 'getItem')
    at bootstrap:148:31
    at bootstrap:147:6
    at new e (build/webpack_bundles/vendors~lightweight_oppia_root~oppia_root.8fbc3b92702ff9e3a94c.bundle.js:1966:2940)
    at n.e (bootstrap:108:49)
    at loadChildren (build/webpack_bundles/lightweight_oppia_root.ce0e54dcdbcc2ac7a176.bundle.js:1:124883)
    at tn.loadModuleFactory (build/webpack_bundles/vendors~lightweight_oppia_root~oppia_root.8fbc3b92702ff9e3a94c.bundle.js:2261:688)
    at tn.load (build/webpack_bundles/vendors~lightweight_oppia_root~oppia_root.8fbc3b92702ff9e3a94c.bundle.js:2261:265)
    at t.project (build/webpack_bundles/vendors~lightweight_oppia_root~oppia_root.8fbc3b92702ff9e3a94c.bundle.js:2198:4440)
    at t._tryNext (build/webpack_bundles/vendors~lightweight_oppia_root~oppia_root.8fbc3b92702ff9e3a94c.bundle.js:3565:4515)
    at t._next (build/webpack_bundles/vendors~lightweight_oppia_root~oppia_root.8fbc3b92702ff9e3a94c.bundle.js:3565:4417)
    at <anonymous>:1:1

Additional context Add details from the logs, like the page the error occurred on. Make sure to anonymize user data like user IDs, exploration IDs, state names, user names, etc. Replace the personal data with appropriate placeholders.

General instructions There are no specific repro steps available for this bug report. The general procedure to fix server errors should be the following:

Analyze the code in the file where the error occurred and come up with a hypothesis for the reason.
Get the logic of the proposed fix validated by an Oppia team member (have this discussion on the issue thread).
Make a PR that fixes the issue, then close the issue on merging the PR. (If the error reoccurs in production, the issue will be reopened for further investigation.)

kevintab95 commented 2 years ago

The error seems to be occuring when localStorage.getItem('direction') is executed. It looks like localStorage is null in a scenario.

kevintab95 commented 1 year ago

This still occurs. Latest logs:

TypeError: Cannot read properties of null (reading 'getItem')
    at bootstrap:148:39
    at bootstrap:147:6
    at new e (build/webpack_bundles/vendors~lightweight_oppia_root~oppia_root.0109fe13033e063c3ce2.bundle.js:2689:2940)
    at n.e (bootstrap:108:49)
    at loadChildren (build/webpack_bundles/oppia_root.d698cb94d1931cc02d1b.bundle.js:311:245276)
    at <anonymous>:1:1

kevintab95 commented 1 year ago

This occurred 10+ times in 30 days.

kevintab95 commented 1 year ago

This occurred 1 time in 11 days.

kevintab95 commented 1 year ago

Occurred 1 time in 5 days.

kevintab95 commented 11 months ago

Occurred 1 time in 2+ weeks.

kevintab95 commented 8 months ago

Occurs 1 time in 1 day.

kevintab95 commented 8 months ago

Occurred 2 times since 3.3.5 went live.

kevintab95 commented 6 months ago

Occurred 8 times in 12 days in 3.3.7.

oppia / oppia

Cannot read properties of null (reading 'getItem') #16004