Opening a group info window should allow viewing the members in the group as well as the members assigned to a role. It appears to show the roles perfectly but fails to show any members in any role, as well as failing to show any membership list.
On reload command in the group window, the membership count will change from 0/# in group to 0/0 and still fail to load.
Grid: Second Life
Built with GCC version 40804
You are at 286279.7, 281015.6, 23.5 in Ribblesdale (1118, 1097) located at sim10722.agni.lindenlab.com (220.127.116.11:13009)
Second Life Server 17.12.01.511131
CPU: Intel(R) Core(TM) i7-6600U CPU @ 2.60GHz (909.692 MHz)
Memory: 19495 MB
OS Version: Linux 4.10.0-42-generic #46~16.04.1-Ubuntu SMP Mon Dec 4 15:57:59 UTC 2017 x86_64
Graphics Card Vendor: Intel Open Source Technology Center
Graphics Card: Mesa DRI Intel(R) HD Graphics 520 (Skylake GT2)
OpenGL Version: 3.0 Mesa 17.3.1
RLV Version: RLV v2.8.0 / RLVa v1.4.10a
libcurl Version: libcurl/7.48.0 OpenSSL/1.0.2g zlib/1.2.8 libidn/1.32
J2C Decoder Version: OpenJPEG: 1.5.2
Audio Driver Version: FMOD Studio 1.08.04
LLCEFLib/CEF Version: 1.6.0-(CEF-OSX-3.2526.1368)
Packets Lost: 64/442338 (0.0%)
Is the group 5000 or more members ? if so this is an old bug LL introduced ages ago.