this error is because the Target version of one of your Pods that not compatible with your application minimums target,
In my application I used Reachability Pods by default the minimum version was 8.0 and my app target version was 11.0
So I fixed it by Changing the Pods version to my App version which is 11.0
Solution
Pod -> chose target -> BuildSetting -> change the IOS Deployment Target
Zardasht
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