Not sure why this just started popping up, but I'm getting a link error:
.pio/build/teensy41/src/main.cpp.o: In function `MTPStorageInterface::MTPStorageInterface()':
/home/mark/src/SOAR/SOAR-Code/SOAR-v2-Code/lib/MTP_t4/src/Storage.h:87: undefined reference to `vtable for MTPStorageInterface'
collect2: error: ld returned 1 exit status
*** [.pio/build/teensy41/firmware.elf] Error 1
Not sure why this just started popping up, but I'm getting a link error:
Found the solution here: https://stackoverflow.com/a/57504289
It's a simple one to implement, so I submitted a pull request: https://github.com/WMXZ-EU/MTP_t4/pull/19