Uncaught CustomError when attempting to edit a filter that uses a Custom Dimension

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Name of affected component: Core Reporting API

Issue summary:
Unable to edit filters across multiple views. Console returns the following 
error: Uncaught CustomError: Error in protected function: Cannot set property 
'innerHTML' of null (e  @   analytics.js:1944 and FG.kRa    @   analytics.js:1567)

Steps to reproduce issue:
1.  Admin
2. Choose account
3. Choose a view
4. Click Filters
5. Edit a Filter (I see this happen most often with Custom filter types, and 
when it uses a custom dimension)

Expected output:
A working screen to edit an existing filter

Actual results:
A stuck "Loading..." butter bar, and unable to change from Predefined to Custom 
filter type or edit existing information. Console shows an error. 

Notes:
I noticed too that when I attempt to create a new filter (at the account level) 
that my custom dimensions are missing from the drop-down menu, under the Custom 
Type. If I attempt to create a new filter under the View level, I can see my 
custom dimensions again; however, if I attempt to edit it again, I'm faced with 
the same issues described above.

Original issue reported on code.google.com by Dav...@ohionet.org on 7 Dec 2015 at 9:50

Attachments:

• [Screen Shot 2015-12-07 at 16.48.41.png](https://storage.googleapis.com/google-code-attachments/analytics-issues/issue-810/comment-0/Screen Shot 2015-12-07 at 16.48.41.png)