On the Build Settings tab under the heading Packaging, there is a setting "Info.plist File". It should show <projectname>/Info.plist, where you have to replace <projectname> with your project name.
When manually adding Info.plist, Xcode may automatically add it to Build Phases "Copy Bundle Resources".
So you need to:
Add Info.plist
Check Build Phases & remove Info.plist from Copy Bundle Resources, if it appears there
Check Build Settings & add the path to Info.plist under Packaging.
Build to check
Regarding the error still showing after you removed Info.plist, it may help to do Product -> Clear All Issues, then Build.