[PD] liblo server error 9904 in path (null): cannot find free port

[Alexandros]

I'm trying to run a patch I've been using for a long time on a Raspberry 
Pi after applying some changes to it and I get the error in the subject 
line. After I applied the changes, before I shut down the Pi, the patch 
run fine. After rebooting the Pi, I keep on getting this error whenever 
I try to turn on the DSP. Tried adding -noloadbang but I get the same. 
After this error I get the "watchdog: signaling pd..." message or a crash.

Tried to run this in gdb and this is the output:

[Thread debugging using libthread_db enabled]
Using host libthread_db library 
"/lib/arm-linux-gnueabihf/libthread_db.so.1".
[Detaching after fork from child process 1131]
[Detaching after fork from child process 1133]
[New Thread 0x74788460 (LWP 1137)]
[Thread 0x74788460 (LWP 1137) exited]
[New Thread 0x73dff460 (LWP 1140)]
[Thread 0x73dff460 (LWP 1140) exited]
liblo server error 9904 in path (null): cannot find free port

Thread 1 "pd" received signal SIGSEGV, Segmentation fault.
0x7546d48c in lo_server_add_method () from 
/usr/lib/arm-linux-gnueabihf/liblo.so.7

When the crash occurs gdb prints the lines below this (including it):
[New Thread 0x73dff460 (LWP 1140)]

The patch is quite big and needs specific hardware to run (Teensy 
micro-controller, and several peripherals), so I don't know if it makes 
sense to share it, since reproducing this error would probably require 
all the hardware. I know my question is rather vague, but that's all I 
can share right now. I'm running Pd-0.50.2 on Raspbian Buster.