Hi - I also seem to have a similar problem after an upgrade to ver 0.35. I have what might be a dumb question…
Working in MacOS, the user/xod/lib/ folder doesn’t seem to contain a xod folder - where does the core library live in MacOS, or is the file hidden?
A file search doesn’t reveal an obvious stray xod folder. I tried a clean install, but still no xod folder in lib, and still have compilation errors. The sketch (was working well in 0.34) is trying to read DS18b20 temperature sensors and 4D Systems screen through a soft UART on an Arduino UNO.
Very grateful for any tips on this!
Jim
Begin compiling code for the board Arduino Uno 
/var/folders/60/99fjskmn06l1mndlm6jh2ttr0000gn/T/xod_temp_sketchbookzfkCdS/xod_1599904627516_sketch/xod_1599904627516_sketch.ino: In member function ‘void xod::xod__common_hardware__ds18b20_thermometer::Node<constant_input_PORT>::evaluate(xod::xod__common_hardware__ds18b20_thermometer::Node<constant_input_PORT>::Context)’:
/var/folders/60/99fjskmn06l1mndlm6jh2ttr0000gn/T/xod_temp_sketchbookzfkCdS/xod_1599904627516_sketch/xod_1599904627516_sketch.ino:2849:40: error: ‘port’ was not declared in this scope
bool success = readTemperature(port, &tc);
^~~~
/var/folders/60/99fjskmn06l1mndlm6jh2ttr0000gn/T/xod_temp_sketchbookzfkCdS/xod_1599904627516_sketch/xod_1599904627516_sketch.ino:2849:40: note: suggested alternative: ‘Uart’
bool success = readTemperature(port, &tc);
^~~~
Uart
Error during build: exit status 1
Compilation failed
Command Process exited with code 1
The generated C++ code contains errors. It can be due to a bad node implementation or if your board is not compatible with XOD runtime code. The original compiler error message is above. Fix C++ errors to continue. If you believe it is a bug, report the problem to XOD developers.