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We utilize Vue.js on our front end and resorts have had difficulty inserting a second Vue instance into their headers and footers as the two Vue instances tend to conflict with each other. If you are going to attempt to use Vue for your footer, make sure that the instance is attaching to the ID of your footer container eg. #YOUR-RESORT-brandfooter (vs. using the default #app) and does not insert any components into the global page scope (window). It is also advised to enable scoped CSS in any Vue component files.
You may have more success using a different framework, such as React or Svelte.
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