Cat indices not working plz help

Hi all
I have elasticsearch 6.8.3 and trying to get all indices from dev tools like this:

GET _cat/indices?v

but I only get blank page:

health status index uuid pri rep docs.count docs.deleted store.size

below are empty

then I tryed to get indices by curl get:

curl -X GET -u user:passw -k "https://hostname.address:9200/_cat/indices?v"

but result is exactly the same

P.S. I could not find any errors in the logs and other things are working, every command works properly only _cat/indices command returns blank page
P.P.S. there are lots of indices on the disk