'IronSource/IronSource.h' file not found in Xcode?

I cannot archive my Xcode project because it returns this error:

‘IronSource/IronSource.h’ file not
found.

Earlier when I built the Xcode project from Unity, the build succeeded but there was this message:

iOS framework addition failed due to a
CocoaPods installation failure. This
will will likely result in an
non-functional Xcode project.

After the failure, “pod repo update”
was executed and succeeded. “pod
install” was then attempted again, and
still failed. This may be due to a
broken CocoaPods installation. See:
CocoaPods Guides - Troubleshooting
for potential solutions.

If anyone had experience in integrating the IronSource SDK into Unity iOS build, please help!

Did you tried this:

Remove the UnityAds.framework from the Linked Frameworks and Libraries in General section of Xcode and then re-add UnityAds.framework either by just drag and drop from project hierarchy to Linked Frameworks and Libraries or by + button at end of Linked

I know this is an old topic, but I was able to fix this issue by manually downloading the corresponding iOS SDK, unzipping it and adding the IronSource.framework folder in Assets/IronSource/Plugins/iOS .