Unresolved Extruder switch off error

So I just bought my 1st printer it's a Robo 3D R1. Did 2 small prints on the 3rd print I was going to do some armor.
Whyall it was in mid print it stopped and I got this message saying.

:Your printer is reporting a hardware Error. This may prevent your printer from functioning properly.
Error reported extruder switched off.
Mini Temp triggered

Please help. I am so upset I just got it and have no clue what to do

 

Your heater block could have a problem that has prevented it from reaching or maintaining correct temperature. It's also possible that the thermistor which reports the temperature is having a problem. I have had to replace the cable connections from the mainboard to the heatbed, at the mainboard, due to the connectors being underrated for the currents necessary to operate properly.

Even if the connector is not the problem, consider to tilt the printer over, remove the bottom cover and examine the connector. It's a pull type connection and should not be blackened or melted.

 

Ok cool I'll check it out when I get back home thanks so much

 

So I took of the bottom and took a couple photos. And looks good