Xcode storyboard: Internal error. Please file a bug

Question

While editing in the storyboard, specifically assigning a view controller to a specific class, I suddenly encountered this error when I wanted to run the project.

Ma

Answer 1

I had the same issue. Got it fixed using below steps :

1. Delete the derived data of your project

2. Clean your project (Shortcut : cmd + shift + k)

3. Now, run your app.

Answer 2

No solution above work for me. I fix it with this:

• close xcode
• open Terminal app and goto project directory
• run command 'pod install'. it regenerate my project
• open project in xcode again

note: this only for project with cocoapod installed project

Answer 3

I simply removed the file causing this issue (just reference not delete) and re-added it again.

Answer 4

Here are the steps to fix this issue:

Uncheck target for the xib file -> clean the project->then check the target->clean the project-> run/build the project. Working in xcode 8.x

Answer 5

I'm using Xcode 9.2 and all the above answers didn't solve the issue. My issue was that i added a constraint accidentally to the TableViewCell Content View. And content view is not constraint applicable and i'm not supposed to add constraints to it. It is already locked. But i really don't know how i added constraint to it accidentally. After deleting the constraint everything started working again perfectly fine.

I thought this answer would help somebody having my same issue.

Answer 6

Just close your Xcode and open it again. issue will be gone.