Cannot read properties of undefined (reading 'slice')

TypeError: Cannot read properties of undefined (reading 'slice')
    at get each (file:///home/russell/sites/officeshop812.ru/dist/server.js:45814:54)
    at simpleMap (file:///home/russell/sites/officeshop812.ru/dist/server.js:39241:22)
    at For (file:///home/russell/sites/officeshop812.ru/dist/server.js:39252:10)
    at createComponent (file:///home/russell/sites/officeshop812.ru/dist/server.js:39194:15)
    at get children (file:///home/russell/sites/officeshop812.ru/dist/server.js:45812:172)
    at Show (file:///home/russell/sites/officeshop812.ru/dist/server.js:39256:41)
    at createComponent (file:///home/russell/sites/officeshop812.ru/dist/server.js:39194:15)
    at get children (file:///home/russell/sites/officeshop812.ru/dist/server.js:45750:14)
    at file:///home/russell/sites/officeshop812.ru/dist/server.js:39440:39
    at catchError (file:///home/russell/sites/officeshop812.ru/dist/server.js:39097:12)