Bug: Application error: Uncaught (in promise): CloseEvent: {"isTrusted":true}

[Leepian]

Error message: Uncaught (in promise): CloseEvent: {"isTrusted":true}

Error stack:

Error: Uncaught (in promise): CloseEvent: {"isTrusted":true}
    at w (altair://-/polyfills-es2018.js:1:42672)
    at altair://-/polyfills-es2018.js:1:41745
    at t (altair://-/10-es2018.js:1:8182)
    at c (altair://-/10-es2018.js:1:8393)
    at l.invoke (altair://-/polyfills-es2018.js:1:37100)
    at Object.onInvoke (altair://-/main-es2018.js:1:1204103)
    at l.invoke (altair://-/polyfills-es2018.js:1:37040)
    at s.run (altair://-/polyfills-es2018.js:1:32512)
    at altair://-/polyfills-es2018.js:1:43444
    at l.invokeTask (altair://-/polyfills-es2018.js:1:37718)

[imolorhe]

When does this error occur? And does it re occur, or it happened only once?

[big-vl]

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