Uncaught TypeError: ref.getURI is not a function

[hillmanm123]

[Enter steps to reproduce:]

1. As shown in the attached screen shot, I had three panes open with focus on the middle pane. The only other community packages downloaded and enabled were numbers-on-a pane 0.1.0, pane-info 1.0.0 and atom-save-all 0.4.1. Pane-by-type was disabled. I was running windows 10 home, version 1607 OS build 14393.693 (64bit x64-based processor)
2. The failure occurred when I tried to collapse the three panes to one by simultaneously depressing the alt-shift-1 keys.

screenshot.pdf
Atom: 1.14.4 x64
Electron: 1.3.13
OS: Microsoft Windows 10 Home
Thrown From: pane-layout-plus package 0.7.3

Stack Trace

Uncaught TypeError: ref.getURI is not a function

At C:\Users\matt\.atom\packages\pane-layout-plus\lib\pane-layout-formatter.coffee:79

TypeError: ref.getURI is not a function
    at Object.formatLayout (/packages/pane-layout-plus/lib/pane-layout-formatter.coffee:79:59)
    at Object.layout (/packages/pane-layout-plus/lib/pane-layout.coffee:21:25)
    at /packages/pane-layout-plus/lib/pane-layout.coffee:6:35)
    at CommandRegistry.module.exports.CommandRegistry.handleCommandEvent (/app.asar/src/command-registry.js:259:29)
    at CommandRegistry.handleCommandEvent (/app.asar/src/command-registry.js:3:59)
    at CommandRegistry.module.exports.CommandRegistry.dispatch (/app.asar/src/command-registry.js:160:19)
    at AtomEnvironment.module.exports.AtomEnvironment.dispatchApplicationMenuCommand (/app.asar/src/atom-environment.js:1164:28)
    at EventEmitter.outerCallback (/app.asar/src/application-delegate.js:320:25)
    at emitThree (events.js:116:13)
    at EventEmitter.emit (events.js:194:7)

Commands

     -1:04.9.0 pane-layout:column-1 (atom-pane.pane.active)

Non-Core Packages

atom-save-all 0.4.1 
numbers-on-a-pane 0.1.0 
pane-by-type 1.0.1 
pane-info 1.0.0 
pane-layout-plus 0.7.3