did you run a full rapid clone or just autoconfig? You will need to run the full config clone to get new environment files. Where there any errors thrown during cloning the database?
I stop aplpication and run postclone script? on databaseo nly?
Please review Cloning the Database Separately section in Cloning Oracle Applications Release 12 with Rapid Clone (Doc ID 406982.1)
You need to run perl adcfgclone.pl dbTechStack in order to get new env files.
You need to run adcfgclone on DB Tier to create all the .env files. Please confirm if adautoconfig - completed with error.