Font Awesome has moved a larger number of their icon options behind their paywall. With V6 we can no longer use the outline/unfilled versions. I propose moving to the bootstrap icon set https://icons.getbootstrap.com, which is fully open source and has a similar icon font to FA.
I'm working on a de-duplicated list of all the current FA icons in use in Koha to confirm we have an equivalent in BI.
Note that we also use vue-fontawesome from Vue apps: example in koha-tmpl/intranet-tmpl/prog/js/vue/modules/erm.ts: 5 import { library } from "@fortawesome/fontawesome-svg-core"; 6 import { 7 faPlus, 8 faMinus, 9 faPencil, 10 faTrash, 11 faSpinner, 12 } from "@fortawesome/free-solid-svg-icons"; 13 import { FontAwesomeIcon } from "@fortawesome/vue-fontawesome";