[Stuck]Error Certification Verify[After TWRP Recover]

Phone: LG G2
Model: LS980
Issue: I'm running stock Rom 4.4.2 , I installed TWRP Recovery to go on custom Rom, but after installing TWRP I cannot access download/recovery mode. It gives me error which says that "Error: Certification Verify" and nothing after that.

Please help me to get rid of. I've tried AutoRec.apk from Cloudyfya but it gives multi colors after applying that . Please help me rather than Autorec.apk

Thanks in advance!