Custom Integration not compliant

Hi all,
I am using a custom component that is no longer compliant with the requirements of HA and with version 2021.6 I have the following log:
‘Logger: homeassistant.setup
Source: setup.py:172
First occurred: 10:27:42 (1 occurrences)
Last logged: 10:27:42
Setup failed for ddwrt_router_service: Integration not found.’

The custom repo is here and is no longer maintained by the creator.

How do you suggest me to proceed?

Have a look at this post on how to add the version requirement to the custom integration to make it work with latest release.
No ‘version’ key in the manifest file for custom integration 'environment_canada - Home Assistant OS - Home Assistant Community (home-assistant.io)

You should also, as the error messages say, report that issue to the developer

Yes, that’s the first thing I did but there is no reaction. It looks like the repo is abandoned.

Thank you.
The “manifest” file is absent. I created one myself but it doesn’t work. Where am I wrong?

{
  "domain": "homeassistant-ddwrt-router-reboot",
  "name": "dd-wrt router reboot",
  "documentation": "https://github.com/FrengerH/homeassistant-ddwrt-router-reboot",
  "dependencies": [],
  "after_dependencies": [],
  "codeowners": [],
  "requirements": [],
  "version": "0.0.1"
}

try changing domain to the name of the folder in custom components which looks like
ddwrt_router_service
image

Yes, that was the problem. Now the log is ok!
Unfortunately, however, the component does not do what it should … But that’s another problem!

If it is abandoned (even if it isn’t) you can fork the github repo, but then someone will expect you to maintain it.