Unable to create index pattern

[Nic0w]

Kibana version:
6.7.0
Elasticsearch version:
6.7.0
Server OS version:
Ubuntu 18.04.2
Browser version:
Version 73.0.3683.86 (Official Build) (64-bit)
Browser OS version:
Ubuntu 18.04.2 LTS
Original install method (e.g. download page, yum, from source, etc.):
with apt-get, as described here
Describe the bug:

When trying to create an index pattern in a freshly installed Kibana, the "Creating index pattern..." wheel keeps spinning forever.
A red "TypeError : Failed to fetch:" will eventually appears top of the window.
After that, visiting the "Discover" panel yields a blank, white page.
Visiting the "Management">"Index Pattern" page will also yield the same blank, white page.

Looking at the Network Console in Chrome, we can see a request being made to
http://elk.*****/api/saved_objects/index-pattern/2313b710-53c8-11e9-8208-8d8a4da7795f
That request never returns and will always end in a "failed" state.

Steps to reproduce:

1. Install the ELK stack
2. add some filter to get data in logstash
3. try creating an index pattern within kibana

Expected behavior:
Actually be able to use Kibana.

Screenshots (if relevant):

Errors in browser console (if relevant):

Provide logs and/or server output (if relevant):
No error is observed in the server logs.
Any additional context:

[greatbsky]

I have the same issue. #34220

[lukeelmers]

I'm having a hard time reproducing this:

• Run a fresh default 6.7.0 distribution (from docker)
• Index a single document

PUT twitter/_doc/1
{
    "user" : "kimchy",
    "post_date" : "2009-11-15T14:12:12",
    "message" : "trying out Elasticsearch"
}

• Navigate to Index Patterns
• Create new Index Pattern pointed at the twitter index

...and I don't get any errors.

@greatbsky @Nic0w Are there any steps I'm missing? Do my steps above work for you?

[Nic0w]

@lukeelmers sorry for the late reply. During my tests, I was hitting the Kibana interface through an IPSec tunnel, on a private address. Trying to setup Let's Encrypt for this domain, I had to access the Kibana interface on the public IP, over the plain Internet. The issue was not anymore reproducible .
Troubleshooting the VPN tunnel yielded no results, it appears to work fine in all regards. I still have no idea what is causing the issue.

[lukeelmers]

The issue was not anymore reproducible . Troubleshooting the VPN tunnel yielded no results, it appears to work fine in all regards.

So you are no longer experiencing this issue then?

[umarfachreza]

i get same issue with this, my kibana cannot create or update index pattern... the "Creating index pattern..." wheel keeps spinning forever and A red "TypeError : Failed to fetch:" will eventually appears top of the window. why this happen? i use kibana and elastic 7.5.0 version.

[mattkime]

Closing due to time elapsed but feel free to reopen if desired.