\Arduino\libraries\TFT_eWidget\src/TFT_eWidget.h:19:26: fatal error: LittleFS.h: No such file or directory compilation terminated.

[qbox4u]

Probably i make a mistake, but others have the knowhow ^_^

Used HW: esp32 (Wemos D1 R32)
Used platform: Arduino IDE
test: Analogue_meters.ino

ERROR:
In file included from C:\Users\qx\OneDrive\Documents\Arduino\libraries\TFT_eSPI\examples\GUI Widgets\Meters\Analogue_meters\Analogue_meters.ino:18:0:
C:\Users\qx\OneDrive\Documents\Arduino\libraries\TFT_eWidget\src/TFT_eWidget.h:19:26: fatal error: LittleFS.h: No such file or directory
compilation terminated.

Solution:
Change TFT_eWidget.h

// LittleFS is required for touch calibration in TFT_eSPI sketches
#if defined (ESP8266) || defined (ESP32)
#include <pgmspace.h>
#include <FS.h>
///////////new: ********************
#if defined (ESP8266)
#include <LittleFS.h>
#elif defined (ESP32)
#include <LITTLEFS.h>
#endif
///////////End of new**************
#endif

[sd-softdev]

You can add the LittleFS lib from lorol

[env:NodeMCU]
...
lib_deps = 
	...
	lorol/LittleFS_esp32@^1.0.6

[matt-kiwi]

I had a similar issue using TFT_eWidget with ESP32 on PlatformIO

My ESP32 framework was out of date, I did an update as follows;
pio platform update espressif32

Which solved my issue.
This thread helped me: platformio/platform-espressif32#877 (comment)
Thanks Valeros :-)