Cannot read property 'map' of undefined
TypeError: Cannot read property 'map' of undefined
at render (http://localhost:6006/main.17a86d2330c9200446be.bundle.js:371:107)
at http://localhost:6006/main.17a86d2330c9200446be.bundle.js:371:118
at Array.map (<anonymous>)
at render (http://localhost:6006/main.17a86d2330c9200446be.bundle.js:371:107)
at http://localhost:6006/main.17a86d2330c9200446be.bundle.js:77:183
at Array.map (<anonymous>)
at Marp (http://localhost:6006/main.17a86d2330c9200446be.bundle.js:76:25)
at renderWithHooks (http://localhost:6006/vendors~main.17a86d2330c9200446be.bundle.js:134899:18)
at mountIndeterminateComponent (http://localhost:6006/vendors~main.17a86d2330c9200446be.bundle.js:137578:13)
at beginWork (http://localhost:6006/vendors~main.17a86d2330c9200446be.bundle.js:138692:16)
The following code causes the bottom error (in storybook).