I followed all the steps until 51 but I do not see nothing about changing the encoding part. Right now, I have Unicode (UTF-8) for my encoding option and I wonder if I should change that to "General US & Western Europe....LATIN-1)" and then click save as it says in step 52?
This is what I see in the guide:

This is what I have following all the steps to 51:

Yeah, sorry, that is a temporary problem for some browsers but your rule gets saved and you can just continue by clicking New and then continuing with Step 87. For some reason, clicking Save & New causes this problem but just clicking Save and then clicking New is ok.
The newest version of Lab 3a says to click Save and then click New. I'm hoping to get the new version of the labs out to your classmates through your instructor soon. Thanks for your help!