General English: Elementary to Upper Intermediate

{"stack":"TypeError: Cannot read properties of null (reading 'title')\n at Object.CourseAccordion [as type] (/var/task/.next/server/1961.026c2838fbba868a.js:43320:61)\n at NextErrorBoundary (/var/task/.next/server/7493.1b244d9ccbf4dde3.js:39934:74)\n at courseAccordion (/var/task/.next/server/1961.026c2838fbba868a.js:43334:98)\n at Ri (/var/task/node_modules/react-dom/cjs/react-dom-server.browser.development.js:10:72713)\n at ji (/var/task/node_modules/react-dom/cjs/react-dom-server.browser.development.js:10:73587)\n at $i (/var/task/node_modules/react-dom/cjs/react-dom-server.browser.development.js:10:76532)\n at Xi (/var/task/node_modules/react-dom/cjs/react-dom-server.browser.development.js:10:78203)\n at Yi (/var/task/node_modules/react-dom/cjs/react-dom-server.browser.development.js:10:77988)\n at Ji (/var/task/node_modules/react-dom/cjs/react-dom-server.browser.development.js:10:80069)\n at Zi (/var/task/node_modules/react-dom/cjs/react-dom-server.browser.development.js:10:79578)","message":"Cannot read properties of null (reading 'title')"}