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Unhandled Promise rejection: Cannot read properties of undefined (reading 'length') ; Zone: ; Task: Promise.then ; Value: TypeError: Cannot read properties of undefined (reading 'length') at eval (eval at (calculusFlashCards:1:130), :1:3155) at t.invoke (polyfills.bb73845776d689efa24c.js:1:8369) at e.run (polyfills.bb73845776d689efa24c.js:1:3469) at polyfills.bb73845776d689efa24c.js:1:15392 at t.invokeTask (polyfills.bb73845776d689efa24c.js:1:9053) at e.runTask (polyfills.bb73845776d689efa24c.js:1:4132) at y (polyfills.bb73845776d689efa24c.js:1:11369) TypeError: Cannot read properties of undefined (reading 'length') at eval (eval at (:1:130), :1:3155) at t.invoke (https://www.deltamath.com/app/polyfills.bb73845776d689efa24c.js:1:8369) at e.run (https://www.deltamath.com/app/polyfills.bb73845776d689efa24c.js:1:3469) at https://www.deltamath.com/app/polyfills.bb73845776d689efa24c.js:1:15392 at t.invokeTask (https://www.deltamath.com/app/polyfills.bb73845776d689efa24c.js:1:9053) at e.runTask (https://www.deltamath.com/app/polyfills.bb73845776d689efa24c.js:1:4132) at y (https://www.deltamath.com/app/polyfills.bb73845776d689efa24c.js:1:11369)
The text was updated successfully, but these errors were encountered:
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Unhandled Promise rejection: Cannot read properties of undefined (reading 'length') ; Zone: ; Task: Promise.then ; Value: TypeError: Cannot read properties of undefined (reading 'length')
at eval (eval at (calculusFlashCards:1:130), :1:3155)
at t.invoke (polyfills.bb73845776d689efa24c.js:1:8369)
at e.run (polyfills.bb73845776d689efa24c.js:1:3469)
at polyfills.bb73845776d689efa24c.js:1:15392
at t.invokeTask (polyfills.bb73845776d689efa24c.js:1:9053)
at e.runTask (polyfills.bb73845776d689efa24c.js:1:4132)
at y (polyfills.bb73845776d689efa24c.js:1:11369) TypeError: Cannot read properties of undefined (reading 'length')
at eval (eval at (:1:130), :1:3155)
at t.invoke (https://www.deltamath.com/app/polyfills.bb73845776d689efa24c.js:1:8369)
at e.run (https://www.deltamath.com/app/polyfills.bb73845776d689efa24c.js:1:3469)
at https://www.deltamath.com/app/polyfills.bb73845776d689efa24c.js:1:15392
at t.invokeTask (https://www.deltamath.com/app/polyfills.bb73845776d689efa24c.js:1:9053)
at e.runTask (https://www.deltamath.com/app/polyfills.bb73845776d689efa24c.js:1:4132)
at y (https://www.deltamath.com/app/polyfills.bb73845776d689efa24c.js:1:11369)
The text was updated successfully, but these errors were encountered: