you can search via XVI32 and edit this line in GS & Client
0F 00 00 00 14 00 00 00 19 00 00 00 23 00 00 00 32 00 00 00
0F = 15 Member
14 = 20 Member
19 = 25 Member
23 = 35 Member
32 = 50 Member
i have by lvl 5 max Member 15 works fine without any problem