wr31 openvpn client connecting re-connecting constantly.

OpenVPN-SA client able to establish connection but losing connection every 30sec aprox. then re-connects.
WR31 : firmware: 6.0.0.6

15:48:50, 08 Feb 2018,OVPN 0 down
15:48:50, 08 Feb 2018,Certificate Code Error
Lib: digital envelope routines
Func: EVP_DecryptFinal_ex
Reason: bad decrypt
15:48:42, 08 Feb 2018,OVPN 0 up
15:48:42, 08 Feb 2018,OVPN 0 up
15:48:41, 08 Feb 2018,OVPN 0 up
15:48:40, 08 Feb 2018,OVPN 0 up
15:48:39, 08 Feb 2018,OVPN 0 up
15:48:39, 08 Feb 2018,OVPN 0 up
15:48:38, 08 Feb 2018,OVPN 0 Available,Activation
15:48:38, 08 Feb 2018,OVPN 0 up
15:48:31, 08 Feb 2018,OVPN 0 down
15:48:27, 08 Feb 2018,OVPN 0 Out Of Service,Activation
15:48:27, 08 Feb 2018,OVPN 0 down
15:48:27, 08 Feb 2018,Certificate Code Error
Lib: digital envelope routines
Func: EVP_DecryptFinal_ex
Reason: bad decrypt
15:48:14, 08 Feb 2018,OVPN 0 Available,Activation
15:48:14, 08 Feb 2018,OVPN 0 up
15:48:08, 08 Feb 2018,OVPN 0 Out Of Service,Activation
15:48:08, 08 Feb 2018,OVPN 0 down
15:48:08, 08 Feb 2018,Certificate Code Error
Lib: digital envelope routines
Func: EVP_DecryptFinal_ex
Reason: bad decrypt
15:48:01, 08 Feb 2018,Par change by , ovpn 0 ipanon to ON
15:48:01, 08 Feb 2018,Par change by WEB 19, ppp 1 ipanon to ON
15:48:01, 08 Feb 2018,Par change by , ppp 1 pppanon to ON
15:48:01, 08 Feb 2018,Par change by locution, ana 0 l3on to 1
15:48:01, 08 Feb 2018,Par change by locution, ana 0 anon to On
15:48:01, 08 Feb 2018,Par change by locution, ana 0 ikeon to 1
15:47:56, 08 Feb 2018,OVPN 0 Available,Activation
15:47:56, 08 Feb 2018,OVPN 0 up
15:47:51, 08 Feb 2018,Default Route 0 Available,Activation
15:47:51, 08 Feb 2018,PPP 1 Available,Activation
15:47:51, 08 Feb 2018,PPP 1 up
15:47:51, 08 Feb 2018,PPP 1 Start
15:47:51, 08 Feb 2018,Modem connected on asy 2
15:47:47, 08 Feb 2018,Modem dialing on asy 2 #:983#
15:47:45, 08 Feb 2018,GPRS Registration On

I got the same issue with the EVP_DecryptFinal_ex error. Have you found a solution for this?

Did you find a solution to this?