SnapCenter API Error 500

Hello,

I'm testing SnapCenter API and for example this CURL...

curl -X GET --header 'Accept: application/json' --header 'Token: ThisIsMyValidToken' 'https://10.240.141.20:8146/api/4.1.1/hosts/mytesthost.dns.suffix/resources'

...only ends up in getting following JSON response:

{
"Message": "An error has occurred."
}

It behaves like this for all my registered hosts (with discovered and protected resources). All my test hosts are WIN VMs with iSCSI disks.

Documentation says I should download logs and search through them. I did. I found nothing.

Does anyone have a suggestion what to do next?

Thanks!