Active Antenna with Off The Shelf GPS Module
Judging by the text printed on the PCB, Addicore uses the same board for 6M, 7M &amp; M8N modules.
The NEO-6M requires that pins 8 &amp; 9 are connected together, so when a NEO-M8N is populated it has its RESET_N and VCC_RF pins connected together.
Although this probably does no harm to the M8N module, I wouldn't be surprised if it causes trouble if the VCC_RF output is controllable by the module and can be switched off by a command over the UART interface - I'd expect that the current draw by the active antenna might pull the combined RESET_N/VCC_RF low enough to reset the module.
Aside from that it seems that the necessary components are populated on the PCB for use with an active antenna.