I meant to include the errors and website i'm trying to copy:

<http://docs.kulerthemes.com/maven/opencart2/>

12:39:54 Error:  "Internal Server Error" (500) after 2 retries at link
docs.kulerthemes.com/robots.txt (from primary/primary)
12:40:00 Error:  "Unable to get server's address: unknown error" (-5) after 2
retries at link primary/robots.txt (from primary/primary)
12:40:00 Warning:  Retry after error -5 (Unable to get server's address: No
such host is known. ) at link primary/feature (from primary/primary)
12:40:31 Warning:  Retry after error -5 (Unable to get server's address:
unknown error) at link primary/feature (from primary/primary)
12:40:34 Error:  "Unable to get server's address: unknown error" (-5) after 2
retries at link primary/feature (from primary/primary)
HTTrack Website Copier/3.48-21 mirror complete in 45 seconds : 25 links
scanned, 20 files written (942087 bytes overall) [947969 bytes received at
21065 bytes/sec], 2.3 requests per connection
(3 errors, 2 warnings, 0 messages)