Error is not clear when submitting query plan in "raw" text format without the header

[NikitaMatckevich]

Query plans start with the header like:

GetAggregatesQuery explanation
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Earlier if one have chosen "text area", "v1" in the input menu, one may have put the query plan without the header. It does not work anymore and the error message is not clear:

TypeError: Cannot read properties of undefined (reading 'parentId')
at findRootInfo (src/components/Summary/Summary.tsx:392:16)
at Summary (src/components/Summary/Summary.tsx:416:20)
at renderWithHooks (node_modules/react-dom/cjs/react-dom.development.js:16305:22)
at mountIndeterminateComponent (node_modules/react-dom/cjs/react-dom.development.js:20074:17)
at beginWork (node_modules/react-dom/cjs/react-dom.development.js:21587:20)
at beginWork$1 (node_modules/react-dom/cjs/react-dom.development.js:27426:18)
at performUnitOfWork (node_modules/react-dom/cjs/react-dom.development.js:26557:16)
at workLoopSync (node_modules/react-dom/cjs/react-dom.development.js:26466:9)
at renderRootSync (node_modules/react-dom/cjs/react-dom.development.js:26434:11)
at recoverFromConcurrentError (node_modules/react-dom/cjs/react-dom.development.js:25850:24)