Unable to connect GlobalProtect

[Gourab_H]

GlobalProtect Unable to connect and the web portal showing err_empty_response. Certificate is already installed in the client.

PANGPS log:

(P2832-T9964)Debug( 929): 12/15/23 09:43:34:892 SSL connecting to x.x.x.x
(P2832-T9964)Debug( 487): 12/15/23 09:43:34:892 socket send buffer old size is 65536
(P2832-T9964)Debug( 511): 12/15/23 09:43:34:892 socket send buffer new size is 3145728
(P2832-T9964)Debug( 567): 12/15/23 09:43:34:892 Network is reachable
(P2832-T9964)Debug(1455): 12/15/23 09:43:35:064 Failed to X509_LOOKUP_load_file
(P2832-T9964)Debug(1106): 12/15/23 09:43:35:127 SSL_read() no data, closed. error=error:00000005:lib(0):func(0):DH lib
(P2832-T9964)Error( 120): 12/15/23 09:43:35:127 SSL Failed to receive!
(P2832-T9964)Debug(1531): 12/15/23 09:43:35:127 OpenSSL alert write⚠️close notify
(P2832-T9964)Info ( 367): 12/15/23 09:43:35:127 Connecting to x.x.x.x failed
(P2832-T9964)Info ( 279): 12/15/23 09:43:35:127 Start vpn do_connect() failed
(P2832-T9964)Debug( 339): 12/15/23 09:43:35:127 tunnel statistics: send bytes(0) packets(0) errors(0) drops(0) queue-size(0), recv bytes(0) packets(0) errors(0) drops(0) queue-size(0)
(P2832-T9964)Debug( 341): 12/15/23 09:43:35:127 do_disconnect is called in VPN stop
(P2832-T9964)Error(1110): 12/15/23 09:43:35:127 sslvpn failed to start
(P2832-T9964)Info ( 104): 12/15/23 09:43:35:127 VPN is deleted
(P2832-T9964)Error(2552): 12/15/23 09:43:35:127 CreateTunnel: SetConfig() failed
(P2832-T9964)Debug(7607): 12/15/23 09:43:35:127 UnsetGatewayRoutes: DeleteIpForwardEntry(x.x.x.x)
(P2832-T9964)Debug(7692): 12/15/23 09:43:35:127 --Set state to Connection failed
(P2832-T9964)Debug(1499): 12/15/23 09:43:35:127 AddAttribute for proxy agent
(P2832-T9964)Debug(2571): 12/15/23 09:43:35:127 VPN tunnel is not connected.
(P2832-T9964)Debug(2573): 12/15/23 09:43:35:127 returns FALSE.
(P2832-T9964)Debug(2674): 12/15/23 09:43:35:127 failed to create tunnel with gateway abc.com

Suddenly it stopped working, PAN-os 10.2.6 GP-6.1.0