Did you search for "loot" via the addons search and checked if there maybe is a similar addon still working?
It's not always neessary to revive old addons if there are replacements.
I know, "changes"... but they provide a real benefit!
In your case here LibScroll e.g. is not available without LibStub so the addon relies on an old lib which needs to be ported to work without LibStub first :-(
I'll give it a try, but PLEASE search for a replacement first. I bet there are several addons providing the same features.
LootAlert v1_0_3
-Fixed the line that caused the errors
-LibStub calls removed
-LibScroll was ported to the "LibScroll" global variable, not using LibStub anymore, added a txt file. It's in the /libs" subfolder now.
All other libraries (LibAddonMenu, LibCustomMenu) were removed! Please install as standalone versions to your live/AddOns folder, via Minion e.g.
The newest versions of them are needed!
Hope it works, it's untested.
If you feel you want to donate something on the NA server, I'm always open for some crafting materials for my char there. Thanks -> @Baertram