Hi Chris,
I’ve just encountered this problem myself whilst working on a simple APRS iGate Rx only node. As you say the solution is to switch to the development branch. The author is aware of the issue so I’m hoping he will integrate the updates with the main release. In the meantime I’ve put together the following script that will automate the installation of an Rx node:
#!/bin/bash
echo "

sudo apt install -y rtl-sdr libasound2-dev cmake
echo "
Downloading and building Dire Wolf
"
git clone https://github.com/wb2osz/direwolf.git/
cd direwolf
git checkout dev
mkdir build && cd build
cmake ..
make -j4
sudo make install
#Create custom config file for Dire Wolf
cd ~
echo "
ADEVICE stdin null
CHANNEL 0
MYCALL enter your call
MODEM 1200
IGSERVER euro.aprs2.net
IGLOGIN your call and iGate passcode
PBEACON sendto=IG delay=0:30 every=60:00 symbol="igate" overlay=R Your lat/lon in this format:lat=nn^nn.nnN long=nn^nn.nnW
">aprs.conf
echo "
Installation complete...
Start the APRS server with: rtl_fm -f 144.80M - |direwolf -c aprs.conf -r 24000 -D 1 -
"