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Morph encountered a problem of the "application crashing" variety. Sorry about that. If you have time, please report the issue here by telling us what you were doing when the error occurred and include a screenshot of this page.
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Error: Uncaught (in promise): Error: NG04002
Error: NG04002
at LG.noMatchError (https://morphchinese.com/main.440abefeaff707a7.js:1:673922)
at https://morphchinese.com/main.440abefeaff707a7.js:1:674207
at https://morphchinese.com/main.440abefeaff707a7.js:1:523714
at vA._error (https://morphchinese.com/main.440abefeaff707a7.js:1:8013)
at vA.error (https://morphchinese.com/main.440abefeaff707a7.js:1:2950)
at vA._error (https://morphchinese.com/main.440abefeaff707a7.js:1:3190)
at vA.error (https://morphchinese.com/main.440abefeaff707a7.js:1:2950)
at vA._error (https://morphchinese.com/main.440abefeaff707a7.js:1:3190)
at vA.error (https://morphchinese.com/main.440abefeaff707a7.js:1:2950)
at vA._error (https://morphchinese.com/main.440abefeaff707a7.js:1:3190)