Issue
After upgrading to K2 Five 5.4 or an installation of a Fix Pack in 5.4 you can face the following error when trying to display the K2 Management page.
Error Code

Could not find a part of the path 'C:Program FilesK2K2 smartforms RuntimeContentJs.[clientdomain].com~ContentJsCommon.js.js'. [clientdomain] System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) [clientdomain] System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost) [clientdomain] System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost) [clientdomain] System.IO.StreamWriter.CreateFile(String path, Boolean append, Boolean checkHost) [clientdomain] System.IO.StreamWriter..ctor(String path, Boolean append, Encoding encoding, Int32 bufferSize, Boolean checkHost) [clientdomain] System.IO.File.InternalWriteAllText(String path, String contents, Encoding encoding, Boolean checkHost) [clientdomain] SourceCode.Forms.AppFramework.BundlingFileGenerator.GenerateStaticBundleFiles(Dictionary`2 _bundleFilesToBeProcessed) [clientdomain] SourceCode.Forms.AppFramework.BundlingUtility.CreateControlBundles(ControlTypeExplorer controlExplorer) [clientdomain] SourceCode.Forms.AppFramework.BundlingUtility.Execute() [clientdomain] SourceCode.Forms.AppFramework.BundlingUtility.<>c__DisplayClass69_0.<AttemptMethod>b__0() [clientdomain] SourceCode.Forms.AppFramework.IO.MutexExecutor`1.Execute(Func`1 function) [clientdomain] SourceCode.Forms.AppFramework.BundlingUtility.AttemptMethod(String logPrefix, BundlingStatus inProgressStatus, BundlingStatus completedStatus, Action functionToExecute) [clientdomain] SourceCode.Forms.AppFramework.BundlingModule.OnPostAuthenticateRequest(Object sender, EventArgs e) [clientdomain] System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() [clientdomain] System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) [clientdomain] System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
Resolution
Restart the K2 service.
Additional Information
You may see this error after upgrading from K2 Five 5.3 to K2 Five 5.4 and after applying FP30 and FP43 of K2 Five 5.4.