I have received error 105 - Communication Error in my response. What does it mean?

Error 105 in our system is classified as a Communication error. This error is caused when the connection with the supplier's system has been refused and we were not able to establish the connection with their system. 

If those errors have appeared from one moment to another, we recommend contacting directly with the supplier in order to figure out if they have any issues at their end (servers crash), check that the URLs of your supplier configurations are right.