Unexpected Application Error!

Cannot read properties of undefined (reading 'split')

TypeError: Cannot read properties of undefined (reading 'split')
    at kv (https://tos-quiz-leng.netlify.app/assets/index-58cfd54e.js:67:6388)
    at Uu (https://tos-quiz-leng.netlify.app/assets/index-58cfd54e.js:38:19497)
    at Kd (https://tos-quiz-leng.netlify.app/assets/index-58cfd54e.js:40:43864)
    at Vd (https://tos-quiz-leng.netlify.app/assets/index-58cfd54e.js:40:39645)
    at Uh (https://tos-quiz-leng.netlify.app/assets/index-58cfd54e.js:40:39573)
    at no (https://tos-quiz-leng.netlify.app/assets/index-58cfd54e.js:40:39428)
    at eu (https://tos-quiz-leng.netlify.app/assets/index-58cfd54e.js:40:35816)
    at Bd (https://tos-quiz-leng.netlify.app/assets/index-58cfd54e.js:40:34767)
    at E (https://tos-quiz-leng.netlify.app/assets/index-58cfd54e.js:25:1585)
    at MessagePort.b (https://tos-quiz-leng.netlify.app/assets/index-58cfd54e.js:25:1955)