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I get this error when deploying my watchOS App to my Apple Watch. It is impossible to deploy it successfully:

"LLDB Provided No Error String"
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I tried cleaning the project and restarting all devices but nothing helped.

I am using the latest Xcode 12.5

2

Answers


  1. I had a same problem. I have Just unchecked: Target-> Edit Scheme -> Run -> Info -> Debug executable.

    It works for me.

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  2. The other answer (turning off the debugger) worked for me, but the underlying reason for this seemed to be that I was running incompatible Xcode and Swift versions (13.4 and 5.7, respectively). After installing the Swift 5.6 toolchain and switching to it in my project, it worked fine. You can see a compatibility matrix here for Xcode / Swift here: https://developer.apple.com/support/xcode/

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