Cannot read properties of undefined (reading 'split')

TypeError: Cannot read properties of undefined (reading 'split')
    at splitByColorDelimiters (file:///src/server.js:3174:41)
    at getColoredNameParts (file:///src/server.js:3194:25)
    at Object.get each (file:///src/server.js:9078:24)
    at simpleMap (file:///src/server.js:610:22)
    at For (file:///src/server.js:621:10)
    at createComponent (file:///src/server.js:562:15)
    at Object.get children (file:///src/server.js:9076:413)
    at Object.get [as children] (file:///src/server.js:584:28)
    at Object.get [as children] (file:///src/server.js:584:28)
    at Object.get [as children] (file:///src/server.js:584:28)