subfinder: panic while running job

The error just happened when I checked the URL., I hope the log and the Subfinder version I used can help to solve the problem. subfinder.zip

$ '/home/user/AppImages/subfinder' -v -r 1.1.1.1,8.8.8.8 -d hashpower.co
===============================================
-=Subfinder v1.1 github.com/subfinder/subfinder
===============================================


Running Source: Ask
Running Source: Archive.is
Running Source: Baidu
Running Source: Bing
Running Source: Censys
Running Source: CertDB
Running Source: CertificateTransparency
Running Source: Certspotter
Running Source: Crt.sh
Running Source: Dnsdb
Running Source: DNSDumpster
Running Source: Dogpile
Running Source: Exalead
Running Source: Findsubdomains
Running Source: Googleter
Running Source: Hackertarget
Running Source: Ipv4Info
Running Source: Netcraft
Running Source: PassiveTotal
Running Source: PTRArchive
Running Source: Riddler
Running Source: Securitytrails
Running Source: SSLCertificates
Running Source: Shodan
Running Source: Sitedossier
Running Source: Threatcrowd
Running Source: ThreatMiner
Running Source: Virustotal
Running Source: WaybackArchive
Running Source: Yahoo

Found Wildcard DNS at hashpower.co
 - 185.53.178.6
Running enumeration on hashpower.co

archiveis: Get http://archive.is/*.hashpower.co: dial tcp: lookup archive.is: Temporary failure in name resolution

[DNSDB] www.hashpower.co
riddler: failed to get authentication token

[SECURITYTRAILS] www.hashpower.co
[WAYBACKARCHIVE] hashpower.co
[HACKERTARGET] hashpower.co2018/07/02 19:20:16 panic while running job: runtime error: invalid memory address or nil pointer dereference
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
	panic: interface conversion: interface {} is runtime.errorString, not string
[signal SIGSEGV: segmentation violation code=0x1 addr=0x30 pc=0x6bdc30]

goroutine 39 [running]:
github.com/subfinder/subfinder/libsubfinder/helper.(*Pool).subworker.func1(0xc4202c4190)
	/home/user/go/src/github.com/subfinder/subfinder/libsubfinder/helper/pool.go:61 +0x163
panic(0x7148a0, 0x92a970)
	/usr/lib/go/src/runtime/panic.go:502 +0x229
github.com/subfinder/subfinder/libsubfinder/sources/sslcertificates.Query(0xc4201c01a0, 0x2, 0x2, 0x6a6601, 0x940101)
	/home/user/go/src/github.com/subfinder/subfinder/libsubfinder/sources/sslcertificates/sslcertificates.go:35 +0xf0
github.com/subfinder/subfinder/libsubfinder/helper.(*Pool).subworker(0xc4201ee000, 0xc4202c4190)
	/home/user/go/src/github.com/subfinder/subfinder/libsubfinder/helper/pool.go:64 +0x6e
github.com/subfinder/subfinder/libsubfinder/helper.(*Pool).worker(0xc4201ee000, 0x3)
	/home/user/go/src/github.com/subfinder/subfinder/libsubfinder/helper/pool.go:78 +0xb3
created by github.com/subfinder/subfinder/libsubfinder/helper.(*Pool).Run
	/home/user/go/src/github.com/subfinder/subfinder/libsubfinder/helper/pool.go:181 +0x7f
[user@0 ~]$