I have created backend with perfectswift. Now I am trying to deploy that with heroku but I am getting some kind of error while pushing. Help me to solve this issue.
Seems to be an issue related with stack compatibility. You need to downgrade your stack:
heroku stack:set heroku-16 -a Your_App_Name
Stack Version Base Technology
----------------------------------------
Cedar-14 (deprecated) Ubuntu 14.04
Heroku-16 Ubuntu 16.04
Heroku-18 (default) Ubuntu 18.04
If you got that warning, means you'll need to use Cedar-14:
heroku stack:set cedar-14 -a Your_App_Name
List of Heroku's stacks: