fatal error: avr/pgmspace.h: No such file or directory 30 | #include <avr/pgmspace.h>

[AlpoReyz]

Why

[haroldcris]

Try this one:

Open the LedControl.h file.
If you don't know the location of the file. In your code, Mouse over the #include "LedControl.h", and a tooltip will show the location of the file.

replace :
include <avr/pgmspace.h>

with

#if defined(__AVR__)
#include <avr/pgmspace.h>
#else
#include <pgmspace.h>
#endif

Got this solution from here