1) tests/timing_outcomes.spec.ts:20:7 › Timing outcomes › "Execution started at" state ─────────── TypeError: Cannot read properties of null (reading 'click') 21 | const cell = await page.notebook.getCell(2); 22 | // Start executing cell but do not wait for it to complete > 23 | await cell.click(); | ^ 24 | await page.keyboard.press('Control+Enter'); 25 | 26 | const widget = await cell.waitForSelector('.execute-time'); at /home/runner/work/jupyterlab-execute-time/jupyterlab-execute-time/ui-tests/tests/timing_outcomes.spec.ts:23:16