Emacs

Having just updated all the packages of my emacs config via Elapca package manager the (elpaca-use-package) function call is now failing at start-up because a recipe for URL cannot be found. No new packages were added to the fully functional config prior to the update. OK. So how do I find out which of the packages I have installed is the culprit? Using 'emacs --debug-init' is about as useful as a chocolate fireplace. Although I would not consider using any editor other than emacs the paucity of useful information in the package managers' error messaging really p***es me off. JEEZ! The least it should do be able to do is provide information as to WHICH package is failing. Any help on how to go about debugging this would be appreciated. Thx. in advance...