OVPN CLient connection fails on IOS device

Hi,

just tried to establish a OVPN connection on an IOS 13.X Client using the OVPN Client from Appstore. I get this error:

2021-01-06 15:48:15 Tunnel Options:V4,dev-type tun,link-mtu 1556,tun-mtu 1500,proto TCPv4_CLIENT,comp-lzo,cipher AES-128-CBC,auth MD5,keysize 128,key-method 2,tls-client

2021-01-06 15:48:15 Creds: Username/Password

2021-01-06 15:48:15 Peer Info:
IV_VER=3.git::2952f561
IV_PLAT=ios
IV_NCP=2
IV_TCPNL=1
IV_PROTO=2
IV_LZO_STUB=1
IV_COMP_STUB=1
IV_COMP_STUBv2=1
IV_GUI_VER=net.openvpn.connect.ios_3.2.2-3507
IV_SSO=openurl


2021-01-06 15:48:15 tls-remote validation
  tls-remote: 'C=ch, ST=BS, L=xxx, O=xxxx, OU=IT, CN=remote.xxx.com, emailAddress=it-services@xxx.com'
  Subj: '/C=ch/ST=BS/L=Basel/O=xxxx/OU=IT/CN=remote.xxx.com/emailAddress=it-services@xxx.com'
  CN: 'remote.xxx.com'

2021-01-06 15:48:15 VERIFY FAIL -- tls-remote match failed

2021-01-06 15:48:15 Transport Error: OpenSSLContext::SSL::read_cleartext: BIO_read failed, cap=2576 status=-1: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed

2021-01-06 15:48:15 EVENT: CERT_VERIFY_FAIL OpenSSLContext::SSL::read_cleartext: BIO_read failed, cap=2576 status=-1: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed [ERR]