[Vuejs]-"Uncaught TypeError: Cannot read properties of undefined (reading 'extend')" when using vue-3d-model package 16 October 2023 by thecoderscamp.com 0👍 I also met the same problem. I upgraded the vue-3d-model version to 2.0.0 and the problem was fixed. [Vuejs]-Vue.js select image if one exists [Vuejs]-How can I correctly output a card with v-for? Source:stackexchange.com