need help with yet another "'Base64_decode' was not declared in this scope" presisting Error.

[Coaxgames]

Platform

• Hardware: ESP-12/ESP8266
• Core Version: AVR V1.8.3 / esp8266 V3.0.2??
• Development Env: Arduino IDE
• Operating System: Windows 10

Settings in IDE

• Module: NodeMCU 1.0 (ESP-12E Module)
• Flash Mode: "2"
• Flash Size: 4MB
• lwip Variant: v2 Lower Memory
• Reset Method: ??
• Flash Frequency: 40MHz??
• CPU Frequency: 80Mhz
• Upload Using: SERIAL
• Upload Speed: 115200

Problem Description

Its a persistent Error.
I have used 3 library's and 4 example sketches.
I have Followed and tried almost every post on the error in google(+more).

ive heard of the built in base64 for esp8266, but i cant find anything to confirm i have it (or that it works in IDE^), when i tried removing "#include <Base64.h>" and the error still persisted, but no error for removing that line.

its only the "'Base64_decode' was not declared" Error.

Well The example code:

MCVE Sketch

#include <Base64.h>

void setup() {
  Serial.begin(115200);
 
  char * toDecode = "SGVsbG8gV29ybGQgVGVzdGluZyBiYXNlNjQgZW5jb2Rpbmch";
  size_t outputLength;
 
  unsigned char * decoded = Base64_decode(toDecode, strlen(toDecode), &outputLength);
 
  Serial.print("Length of decoded message: ");
  Serial.println(outputLength);
 
  Serial.printf("%.*s", outputLength, decoded);
  free(decoded);
}
 
void loop() {}

Error That i cannot solve/fix/Find at all is below, its almost taunting me lol, but yea long story short,
i have searched through google, reddit and git.i have spent hours playing, Searching and seeing the same thing with this problem, yet still no fix that i have found.

CryptoESPBase64Test:9:29: error: 'Base64_decode' was not declared in this scope
    9 |   unsigned char * decoded = Base64_decode(toDecode, strlen(toDecode), &outputLength);
      |                             ^~~~~~~~~~~~~
exit status 1
'Base64_decode' was not declared in this scope

[d-a-v]

base64 for this core specifically is there : https://github.com/esp8266/Arduino/blob/master/cores/esp8266/base64.h
(with an encoding example).

If you need Arduino portability, you need to use one of them.

Where did you get your snippets / examples ?
Were they for Arduino or esp8266/Arduino ?