Cannot read properties of undefined (reading 'onEvents')

[vs-code-engineering]

TypeError: Cannot read properties of undefined (reading 'onEvents')
at i.$acceptModelChanged in src/vs/workbench/services/textMate/browser/backgroundTokenization/worker/textMateTokenizationWorker.worker.ts:126:32
at f.g in src/vs/base/common/worker/simpleWorker.ts:510:59
at Object.handleMessage in src/vs/base/common/worker/simpleWorker.ts:487:88
at _.k in src/vs/base/common/worker/simpleWorker.ts:245:32
at _.h in src/vs/base/common/worker/simpleWorker.ts:209:17
at _.handleMessage in src/vs/base/common/worker/simpleWorker.ts:178:8
at f.onmessage in src/vs/base/common/worker/simpleWorker.ts:493:18
at self.onmessage in src/vs/base/worker/workerMain.ts:147:57

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