"Uncaught (in promise) TypeError: options.map is not a function" using select

[benshuk]

Hey,
I'm using select like this:

<v-select v-model="value"
 v-bind:disabled="!key"
 v-bind:url="getURL()"
 placeholder="value"
 search multiple show-count></v-select>

and getting

Uncaught (in promise) TypeError: options.map is not a function

where as default options, key = '' and value = [].
I checked the response of the URL I get from calling getURL(), and it returns an array of strings, just as expected.
it happens only for some queries, and not all of them.
is there any way to solve this? :(