Hi,
in Version 2.64.7+170404 I can use the text fields above the column as filter in partecipants and answers table.
When I Installed version 2.65.3+170607 and Version 2.67.1+170626 errors appear...

Before I thought that the problem was in installation of new version (windows environment), but after some trial I have found that:
- in version 2.65.3+170607 and Version 2.67.1+170626 a error appear only (see joint file) when I have more the 45 attributes (last must be attribute_45)... If I have 46 attributes (or more) the filter in Partecipants and Answers doesn't work and the attached page error appear...
- If I delete the attributes and arrive just to "45 attributes" the search form come back to work usually, as in previous version

I thinks that some component (js) may be changed between the version (in Version 2.64.7+170404 I'm using 48 attribute and search fields work)

Now, I've more surveys running...using more 45 attributes.

Someone have some suggestion to increment the number of attribute managed?

Thanks a lot

Please file a bug report.