Hello,
The bash error “xxxxxx: command not found” shows up when you try to run a command/program that’s not installed or not in the path, etc.
Try opening a terminal and type
source ~/.bashrc
If the error shows up, then it’s definitely something in there that’s the problem. Look through the file for the line that causes the error - could go line by line pasting into a terminal if it’s not overwhelming, or add echo "step 1" … echo "step 2" etc lines to narrow it down. Then remove/modify the offending line.
I hope this helps!