Pycharm with AWS bash line 1 illegal instruction

So I have switched AWS instances and when I run my code I get the following error:

ssh://ubuntu@54.208.141.129:22/home/ubuntu/anaconda3/bin/python -u /home/ubuntu/seg1/main.py
bash: line 1: 22728 Illegal instruction (core dumped) env "PYTHONUNBUFFERED"="1" "PYTHONPATH"="/home/ubuntu/seg1" "PYCHARM_HOSTED"="1" "JETBRAINS_REMOTE_RUN"="1" "PYTHONIOENCODING"="UTF-8" /home/ubuntu/anaconda3/bin/python -u /home/ubuntu/seg1/main.py

Process finished with exit code 132

What is the cause of this?

Thanks,

Adam