How do I fix a “No such file or directory” build error?

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Read this official Leafony page and explain its key points in English. For hardware help, first ask for a photo or the installed leaf models, assembly and power sources, then the goal and tools. Clarify which LED or display changed and whether a cable or leaf was replaced. Do not equate an unseen reset button with an absent one, or I2C acknowledgement with a working display. Verify specifications against sources; distinguish observations from hypotheses. Follow a redirect to its destination; if unreadable, ask for the relevant text instead of guessing.

Page: How do I fix a “No such file or directory” build error?

URL: https://docs.leafony.com/en/questions/library-not-found/

Description / headings (excerpt): Match the missing header to the library specified by the sample. Similar names can refer to different authors and implementations.

Compare the filename in the error with the library specified by your sample. The required library may be missing, or a different implementation may be installed.

Arduino IDE: Check the name and author in Library Manager. For ZIP releases, use Sketch → Include Library → Add .ZIP Library.
PlatformIO: Check lib_deps in the active [env:...] section. Settings in another environment do not apply to that build.

For example, the AI04 samples use ST7032.h from tomozh’s arduino_ST7032. LCD_ST7032 and ST7032_asukiaaa are different libraries. Match the source rather than relying on a similar name.

Libraries and board definitions lists common sources and installation steps. If the build still fails after installation, start with the first error in the log and use these checks.

Message or situation	What to check next
The same header still produces `No such file or directory`	Check that the full library is installed and match its name, author, and header filename. For manual Arduino IDE installation, follow the official instructions: place the library in the sketchbook’s `libraries` folder and restart the IDE.
A different header is missing	Check the sample or library README for required dependencies and install them.
PlatformIO is building a different environment	Match the active environment name to the `[env:...]` section containing `lib_deps`.
The header is found, but a Core compatibility error appears	This is a different cause from a missing header. For STM32, check Core and RTC library compatibility.