A lot of errors in the Cura printing Term

[nick-leijenhorst 0]

I'm noticing that I see a lot of errors in the terminal of the printing screen, they look like this:

 

echo:Unknown command: ""
echo:Active Extruder: 0
Error:checksum mismatch, Last Line: 4
Error:Line Number is not Last Line Number+1, Last Line: 4
Error:No Line Number with checksum, Last Line: 4
Error:Line Number is not Last Line Number+1, Last Line: 4
Error:Line Number is not Last Line Number+1, Last Line: 4
Error:No Line Number with checksum, Last Line: 4
Error:Line Number is not Last Line Number+1, Last Line: 4
Error:No Line Number with checksum, Last Line: 4
Error:Line Number is not Last Line Number+1, Last Line: 4
Error:No Line Number with checksum, Last Line: 4
Error:Line Number is not Last Line Number+1, Last Line: 4
Error:Line Number is not Last Line Number+1, Last Line: 5
Error:Line Number is not Last Line Number+1, Last Line: 5
Error:Line Number is not Last Line Number+1, Last Line: 5
Error:Line Number is not Last Line Number+1, Last Line: 5
Error:Line Number is not Last Line Number+1, Last Line: 5
echo:Unknown command: "5"
Error:No Line Number with checksum, Last Line: 5
Error:Line Number is not Last Line Number+1, Last Line: 6
Error:No Line Number with checksum, Last Line: 6
Error:checksum mismatch, Last Line: 22
Error:Line Number is not Last Line Number+1, Last Line: 22
Error:checksum mismatch, Last Line: 55
Error:No Line Number with checksum, Last Line: 55
Error:No Checksum with line number, Last Line: 85
Error:Line Number is not Last Line Number+1, Last Line: 85

How bad are these errors? What causes them?

I hope someone can clarify