MAX 31855 and Thermocouple Errors

Other Hardware Sensors
18 
 //CS pins high to turn off
  digitalWrite(csPin1, HIGH); 
    
  tc1.begin();

  digitalWrite(csPin1, LOW); //Switch ON CS

You should not be toggling the csPin1.
This is handled by the library. " digitalWrite(csPin1, LOW)" will signal the MAX31855 to start a new conversion.
toggling the csPin1 in your code should be removed. That should help!