function initUseVue Vueuse = function plugin var installedPlugins = this_installedPlugins this_installedPlugins = ; if installedPluginsindexOfplugin -1 return this;

The error "Cannot read properties of undefined (reading 'install')" occurs because the plugin variable passed to the Vue.use function does not have a property named install.

To fix this error, you need to make sure that the plugin being passed to Vue.use is a valid plugin object that has an install method.

Here's an example of how you can define a plugin with an install method:

var myPlugin = {
  install: function (Vue, options) {
    // Your plugin logic here
  }
}

Then, you can use the plugin by calling Vue.use(myPlugin).

Make sure that the plugin being passed to Vue.use is a valid plugin object with an install method, and the error should be resolved