I deleted some lightwave devices from config/.storage/lovelace that were still showing on UI after I had deleted them from configuration.yaml but it seems I have now messed it up and when opening HA i’m greeted with Expecting ',' delimiter: line 48 column 5 (char 1583)
That’s why you are not supposed to edit .storage files - you’ve broken the json format. There is a raw editor.
Your best course of action might be to load states again and delete the lovelace file in storage (or rename it) and then let it create a lovelace file again, take control and then see if you can work out what you broke and copy/paste back from the old one. Make sure HA is stopped before you play with the storage files though.