Most unstable but highly useful gridftp service. Configuration and documents are scattered all around so it is really easy to troubleshoot your self.

Not sure but suddenly proxy is not setting up paths correctly.
one thing i found is to do following steps manually.
stop all services and backup anything you move.

ln -s /var/lib/globus-connect-server/grid-security/ /etc/grid-security
systemctl start globus-gridftp-server
/usr/sbin/myproxy-server -c /var/lib/globus-connect-server/myproxy-server.conf
globus endpoint activate --myproxy <UUID>

if complaint about MYPROXY_SERVER_DN - please open web interface and update your MyProxyDN