Confirmed, sorry for the inconvenience. Temporarily, you can revert to v117 from this link, just unpack the archive to your PlatformIO home directory: /home/user/.platformio/framework-mbed and install the stable PlatformIO 2.9.5.
That’s OK, the issue appears only on the boards with a custom vendor due to the new structure of mbed ethernet library. Let’s keep your config with lpc1768 board until I fix this issue.
Sorry again for the nuisance.