You are receiving the error because you are trying to config interface xe-0/0/16 specifically to be a member of VLAN30 (I assume vlan-id 30) as well as make it via the range a trunk and a member VLAN-ID, 4-75 (which includes VLAN30, I assume). Depending upon what you want, you could either exclude xe-0/0/16 from range_1, or not specifically configure xe-0/0/16 with VLAN30.
The former would make xe-0/0/16 an access (non-Trunk, non-802.1q) interface being a member of VLAN30, the latter would be xe-0/0/16 becomes both a trunk and a member of 4-75 via range_1.
Hopefully this helps.