sfpowerkit:source:profile:reconcile -s fails with error: Cannot read property 'getUsername' of undefined

Describe the bug sfdx sfpowerkit:source:profile:reconcile -s failing with error:

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sfpowerkit  -- The DX@Scale Developer Toolkit -Version:4.1.5 -Release:February 22
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INFO [2022-02-16 11:29:54.769 +0000] (sfpowerkit): Profiles Found in Entire Drirectory 24
INFO [2022-02-16 11:29:54.769 +0000] (sfpowerkit): Initiated Profile reconcile thread :1  with a chunk of 1 profiles
INFO [2022-02-16 11:29:54.769 +0000] (sfpowerkit): Profiles queued in thread :1 :
INFO [2022-02-16 11:29:54.769 +0000] (sfpowerkit): ["C:\\xx\\force-app\\main\\default\\profiles\\Admin.profile-meta.xml"]
ERROR [2022-02-16 11:29:54.770 +0000] (sfpowerkit): Cannot read property 'getUsername' of undefined
    err: {
      "type": "TypeError",
      "message": "Cannot read property 'getUsername' of undefined",
      "stack":
          TypeError: Cannot read property 'getUsername' of undefined
              at C:\Users\x\AppData\Local\sfdx\node_modules\sfpowerkit\src\impl\source\profiles\profileReconcile.ts:100:33
              at new Promise (<anonymous>)
              at ProfileReconcile.runWorkers (C:\Users\x\AppData\Local\sfdx\node_modules\sfpowerkit\src\impl\source\profiles\profileReconcile.ts:73:25)
              at ProfileReconcile.<anonymous> (C:\Users\x\AppData\Local\sfdx\node_modules\sfpowerkit\src\impl\source\profiles\profileReconcile.ts:58:18)
              at Generator.next (<anonymous>)
              at fulfilled (C:\Users\x\AppData\Local\sfdx\node_modules\sfpowerkit\lib\impl\source\profiles\profileReconcile.js:24:58)

Expected behavior Version 4.0.3 runs fine without any problems. 4.1.3 to 4.1.5 are having the error.

Desktop:

• OS: Windows 10
• Node Version 14.17.0; 14.18.2
• Version of sfpowerkit 4.1.5
• sfdx-cli/7.137.1 win32-x64 node-v14.18.2