I2C sending several bytes from Attiny84 to Atmega1284

Nope, hat doesn't seem to work either.

Here's how I request the data on the master side:

 // ---------------------- Requesting data from convenience module at slave address #3

    Wire.requestFrom(3, 9); //Requesting 9 bytes of data from convenience module

    if (!Wire.available())  enterErrorTable(13);    // if i²C connection is down, an error is entered into a
                                                    // table and a warning is given out
                                                    // that the convenience module is malfunctioning
    else {
      
      resetErrorTable(13);                             // if I²C works, the error table is reset in line 14

      byte i = 0;
      while (Wire.available())   // slave may send less than requested
      {
        convenienceModuleData[i] = Wire.read(); // receive a byte as character
        i++;
      }

What then happens is that the sketch goes through my errorTable one by one where those errors are stored and gives out a warning. And at present, I get a warning that the I²C connection is faulty because if (!Wire.available()) is true.