My Nexus Repository Manager OSS page shows "?"

I am a chinese user,I use Nexus Repository Manager OSS 2.14.9-01 ,the os is centos 6.8
the error is :

please help me ,thank you

This is a known issue in Nexus Repo 2.x:

It was fixed in version 3.



thank you very much.
because of some other things, Do you have any other simple approach to fix the issue without upgrading version 2 to version 3 ?