Cocoapods + Cannot load underlying module for 'x'

Question

This seems to be a bug in XCode. I had the same problem, and as described in the comments of another answer to this question, building the project made the error go away.

Go to Product > Build and it will resolve the problem:

This worked for me:

1. Close your project
2. In terminal go to your project directory
3. Add this command: pod update
4. After that all your pods will be updated. Just run your project

Cannot load underlying module for 'x'for SWIFT :

How to fix the Issue:

step:1 Create a New project and build&run Successfully without installing pod.

step:2 After build&run the Project Successfully ,Now try to install pod and then try to importrealm,alamofire,charts etc it will work like a charm.

Failure Case --> New project -> Add (realm,alamofire,charts etc) via cocoapods w/o building first -> open Xcode workspace -> build&run

Success Case -->New project -> build&run -> add (realm,alamofire,charts etc)via cocoapods -> open Xcode workspace -> build&run again = success

Once you have installed Alamofire pod.

Step.1 you should open your project by double click on your_project_name.xcworkspace file.

Step.2 Go to project settings --> Build Phases --> Link Binary with Libraries --> Add framework "Alamofire.framework"

Thats it!!

Now you can import the module