Running 14.0.13 is fine, tried to go to 14.1.20 and when our software starts up, all is fine at the Login Screen, but when we go to the next screen (menu, etc.) this error is caught by Chrome and our screen looks like the styles are not applied.
Uncaught Error: A custom element with name ‘dom-module’ has already been defined.
at Zd (webcomponents-sd-ce.js:145)
at Q.n.define (webcomponents-sd-ce.js:145)
at Q.Rf.define (webcomponents-sd-ce.js:197)
at eval (webpack-internal:///…/node_modules/@polymer/paper-dropdown-menu/node_modules/@polymer/polymer/lib/elements/dom-module.js?babel-target=es6:181)
at Module…/node_modules/@polymer/paper-dropdown-menu/node_modules/@polymer/polymer/lib/elements/dom-module.js?babel-target=es6 (VAADIN/build/vaadin-bundle-fef654298c2d6431b2e1.cache.js:625)
at webpack_require (VAADIN/build/vaadin-bundle-fef654298c2d6431b2e1.cache.js:20)
at eval (webpack-internal:///…/node_modules/@polymer/paper-dropdown-menu/node_modules/@polymer/polymer/lib/utils/style-gather.js?babel-target=es6:10)
at Module…/node_modules/@polymer/paper-dropdown-menu/node_modules/@polymer/polymer/lib/utils/style-gather.js?babel-target=es6 (VAADIN/build/vaadin-bundle-fef654298c2d6431b2e1.cache.js:1021)
at webpack_require (VAADIN/build/vaadin-bundle-fef654298c2d6431b2e1.cache.js:20)
at eval (webpack-internal:///…/node_modules/@polymer/paper-dropdown-menu/node_modules/@polymer/polymer/lib/mixins/element-mixin.js?babel-target=es6:8)