"gatsby-theme-wordpress-gutenberg" error running onCreateNode lifecycle

[alexhwebdev]

Hi. Im not sure if there is a solution for this but I am receiving an error while running "gatsby develop".
I have successfully been able to expose the "blocks" in Gatsby with "WP GraphQL Gutenberg" and "gatsby-theme-wordpress-gutenberg" setup and the project works fine running "gatsby develop". But within the build process, I am receiving the error below on the terminal. Thank you in advance.

ERROR #11321 PLUGIN
"gatsby-theme-wordpress-gutenberg" threw an error while running the onCreateNode lifecycle:
Cannot read property 'startsWith' of undefined

411 | } = options
412 |

413 | if (node.internal.owner.startsWith(gatsby-source-wordpress)) {
| ^
414 | if (isNodeWithBlocks({ node })) {
415 | createNodeField({
416 | node,

File: node_modules/gatsby-theme-wordpress-gutenberg/gatsby-node.js:413:27
TypeError: Cannot read property 'startsWith' of undefined

• gatsby-node.js:413 Object.exports.onCreateNode
  [ibd-gatsby-wordpress-starter]/[gatsby-theme-wordpress-gutenberg]/gatsby-node.js:413:27

• api-runner-node.js:434 runAPI
  [ibd-gatsby-wordpress-starter]/[gatsby]/src/utils/api-runner-node.js:434:22

• api-runner-node.js:590 Promise.catch.decorateEvent.pluginName
  [ibd-gatsby-wordpress-starter]/[gatsby]/src/utils/api-runner-node.js:590:13

• debuggability.js:384 Promise._execute
  [ibd-gatsby-wordpress-starter]/[bluebird]/js/release/debuggability.js:384:9

• promise.js:518 Promise._resolveFromExecutor
  [ibd-gatsby-wordpress-starter]/[bluebird]/js/release/promise.js:518:18

• promise.js:103 new Promise
  [ibd-gatsby-wordpress-starter]/[bluebird]/js/release/promise.js:103:10

• api-runner-node.js:588
  [ibd-gatsby-wordpress-starter]/[gatsby]/src/utils/api-runner-node.js:588:16

• util.js:16 tryCatcher
  [ibd-gatsby-wordpress-starter]/[bluebird]/js/release/util.js:16:23

• reduce.js:166 Object.gotValue
  [ibd-gatsby-wordpress-starter]/[bluebird]/js/release/reduce.js:166:18

• reduce.js:155 Object.gotAccum
  [ibd-gatsby-wordpress-starter]/[bluebird]/js/release/reduce.js:155:25

• util.js:16 Object.tryCatcher
  [ibd-gatsby-wordpress-starter]/[bluebird]/js/release/util.js:16:23

• promise.js:547 Promise._settlePromiseFromHandler
  [ibd-gatsby-wordpress-starter]/[bluebird]/js/release/promise.js:547:31

• promise.js:604 Promise._settlePromise
  [ibd-gatsby-wordpress-starter]/[bluebird]/js/release/promise.js:604:18

• promise.js:649 Promise._settlePromise0
  [ibd-gatsby-wordpress-starter]/[bluebird]/js/release/promise.js:649:10

• promise.js:729 Promise._settlePromises
  [ibd-gatsby-wordpress-starter]/[bluebird]/js/release/promise.js:729:18

• async.js:93 _drainQueueStep
  [ibd-gatsby-wordpress-starter]/[bluebird]/js/release/async.js:93:12

[ruimiew]

Did you manage to fix this? Having the exact same issue!