docnav "TLS initialization failed"

解决方法：

cd /opt/Xilinx/DocNav/lib
ln -s libssl.so.10 libssl.so
ll libssl.so*

参考：
https://forums.xilinx.com/t5/Design-Entry/IP-Documentation-Won-t-Open-in-Vivado-2019-1-1-on-Ubuntu-18-04-2/td-p/998875