Cannot compile with version 3.0.3 and Xcode 9 due to incompatible Swift version

[btcnewsapp]

I am unable to compile my app using Charts 3.0.3 added via Pod (3.0.4 does not seem to exist as a pod) and Xcode 9, due to incompatible version of Swift. Compiled fine with Xcode 8.3.3. Error message below. I have already tried cleaning out the derived data directory and the build, restarting Xcode, but get the same error message.

error: The following binaries use incompatible versions of Swift:
/Users/tal/Desktop/Xcode Projects/BTCnews/Charts.framework/Charts
/Users/tal/Library/Developer/Xcode/DerivedData/BTCnews-fcmtcvbpettdsxayujdaqryenzee/Build/Products/Release-iphoneos/BTCnews.app/BTCnews

Ideas? Thanks!

[btcnewsapp]

Issue resolved. I had an extra Charts framework in the build from the pre-Cocoapods installation, which was getting in the way. Removing it from the required and embedded frameworks seems to have solved the issue.