Adding new source - Error without text

I am trying to add a new Prometheus source. I can curl the address and see data:

# HELP process_virtual_memory_bytes Virtual memory size in bytes.
# TYPE process_virtual_memory_bytes gauge
process_virtual_memory_bytes 188379136.0
# HELP process_resident_memory_bytes Resident memory size in bytes.
# TYPE process_resident_memory_bytes gauge
process_resident_memory_bytes 40480768.0
# HELP process_start_time_seconds Start time of the process since unix epoch in seconds.
# TYPE process_start_time_seconds gauge
process_start_time_seconds 1538041555.58
# HELP process_cpu_seconds_total Total user and system CPU time spent in seconds.
# TYPE process_cpu_seconds_total counter
process_cpu_seconds_total 180.51
# HELP process_open_fds Number of open file descriptors.
# TYPE process_open_fds gauge
process_open_fds 16.0
# HELP process_max_fds Maximum number of open file descriptors.
# TYPE process_max_fds gauge
process_max_fds 1048576.0
# HELP python_info Python platform information
# TYPE python_info gauge
python_info{implementation="CPython",major="3",minor="7",patchlevel="0",version="3.7.0"} 1.0
# HELP active_feed_clients Number of active users per feed
# TYPE active_feed_clients gauge

But, when I click Save & Test, I get an error box with no details:

image

I am not sure what I am doing wrong.

If it makes any difference, the service that is reporting the data is inside a Kubernetes pod. But, From the Grafana server, I can make curl requests so it should have no problem seeing it.

Thanks for any help you can offer.

Can you open chrome dev tools console and view error info?

Sureā€¦ But everything seems fine.

There is a PUT (looks like it is adding the new source) and two GETs (one for settings, and one to retrieve the new source).

No errors.

Probably CORS related - check the console tab in chrome dev tools. Are you using Browser access mode?