Cannot read properties of null (reading 'endsWith') #1186

Uncaught TypeError: Cannot read properties of null (reading 'endsWith')
    at parseColWidth (useWidthColumns.js:8:1)
    at useWidthColumns.js:26:1
    at Array.forEach (<anonymous>)
    at useWidthColumns.js:25:1
    at mountMemo (react-dom.development.js:17225:1)
    at Object.useMemo (react-dom.development.js:17670:1)
    at Object.useMemo (react.development.js:1650:1)
    at useWidthColumns (useWidthColumns.js:18:1)
    at useColumns (index.js:252:1)
    at Table (Table.js:158:1)