-50 NOTCRAWLED https://podcrto.si/

hi,

I try to harvest this site: https://podcrto.si
As National Library we harvest several domains to preserve the information.
I tried with Heritrix 1.14.4 and 3.4 but without success.

I'm getting this:

[code] [status] [seed] [redirect]
-50 NOTCRAWLED https://podcrto.si/
200 CRAWLED https://e-uprava.gov.si/

and

LONGEST#2:
Queue si,podcrto, (p3)
2 items
wakes in: 13m45s77ms
last enqueued: https://podcrto.si/robots.txt
last peeked: https://podcrto.si/robots.txt
total expended: 15 (total budget: -1)
active balance: 2985
last(avg) cost: 1(1)
totalScheduled fetchSuccesses fetchFailures fetchDisregards fetchResponses robotsDenials successBytes totalBytes fetchNonResponses lastSuccessTime
3 1 0 0 1 0 54 54 16 2019-05-23T07:14:29.825Z
SimplePrecedenceProvider
3

Can anyone help or explain what could be the reason for this?
Thank you in advance.

Best,
Matjaž