Broken setup after LetsEncrypt failed install

Hi all,

I am hoping someone would be kind enough to help a new learner out. I have a site I had setup and I’ve been administering it myself, learning as I go. I thought I would be up to installing LetsEncrypt onto the Ubuntu setup but alas failed miserably, and then when I tried to back out it turns out I don’t actually have a backup or any knowledge of how to set things up properly.

The site is Java based with all files stored in a DATA directory on the server which also includes TomCat 8.5.29 and the .war file (all files also seem to be stored here so…does the site service the WAR file or the unpacked content, ie. index.html or java files?). From this area I have the main site and then an additional management console -admin which allows me to manage the site content/users, etc.

The site itself is now pointing to an apache2 area serving the html standard apache page.

All help gratefully received. COVID means I have no savings to go back to the original developers to correct my incompetance.

thanks

MySQL is also running on the server.