FortiClient Windows 7

I have a user who's connecting to the data center through FortiVPN Client running on Windows 7 "I know it's end of support"

Every time he tried to connect the connection stopped at 48%, I enabled TLS1.0 and TLS1.1 but still the same issue

I set the dh-params to 1024 but didn't work too

[6860:root:0]ap_read,105, error=1, errno=0 ssl 0x7f4c9e0e9000 Success. error:0A000126:SSL routines::unexpected eof while reading [6860:root:7fa]sslvpn_read_request_common,677, ret=-1 error=-1, sconn=0x7f4c9ecd6400. [6860:root:7fa]Destroy sconn 0x7f4c9ecd6400, connSize=0. (root) [6860:root:7fb]allocSSLConn:306 sconn 0x7f4c9ecd6400 (0:root)  [6860:root:7fd]fsv_rmt_saml_autoauth_cb:113 No 'Authorization' header found. [6860:root:7fd]SSL state:fatal decode error [6860:root:0]ap_read,105, error=1, errno=0 ssl 0x7f4c9e106000 Success. error:0A000126:SSL routines::unexpected eof while reading [6860:root:7fd]sslvpn_read_request_common,677, ret=-1 error=-1, sconn=0x7f4c9ecd4100. [6860:root:7fd]Destroy sconn 0x7f4c9ecd4100, connSize=1. (root)