problem

Arduino: 1.8.18 (Windows 10), Board: "Generic ESP8266, None, dtr (aka nodemcu), 26 MHz, 40MHz, DOUT (compatible), 1MB (FS:64KB OTA:~470KB), 2, 160 MHz, Flash, Legacy (new can return nullptr), All SSL ciphers (most compatible), Disabled, None, v2 Lower Memory, All Flash Contents, 115200"

DeautherX:1:28: fatal error: StringSplitter.h: No such file or directory

#include <StringSplitter.h>

                        ^

compilation terminated.

exit status 1

StringSplitter.h: No such file or directory

This report would have more information with "Show verbose output during compilation" option enabled in File -> Preferences.

install StringSplitter lib to your arduino ide