You can apply this patch to fix. In the file open-audit/code_igniter/application/views/theme-bootstrap/v_devices_collection.php, change lines 61 and 62 from
$export_link = $this->response->links->self; if (strpos($this->response->links->self, '?') !== false) {
to
$export_link = $this->response->links->first; if (strpos($this->response->links->first, '?') !== false) {
Apologies for the inconvenience.
A workaround is to manually add &format=json (or csv or xml) to the end of the URL.
but v1.12.10 can