Region Options message indicating template error

Any suggestions where to look to debug an issue when this kind of message appears under Region Options.

Template

Notice: Undefined index: label in ..../perch/core/apps/content/modes/region.options.post.php on line 263

Notice: Undefined index: path in .../perch/core/apps/content/modes/region.options.post.php on line 263

• The full path on file => is my local computer path so I replaced it with a ...

I've been trying to figure out what I did to cause it, for a couple of days now, so looking for a hint where I might look.

The front end page regions display correctly, and the back end regions data entry screens work properly. The only time I get the error is when I visit region options on any page's regions. I believe I introduced the problem as it is isolated on one branch used for template development where either we introduced a naming conflict or a variance in number of fields in category or content template.

DIAGNOSTICS:
SELECT u.*, r.* FROM perch2_users u, perch2_user_roles r
WHERE u.roleID=r.roleID AND u.userEnabled='1' AND u.userID=1 AND u.userHash='5482819572f7fd42e920e4e314b34e7d'
LIMIT 1
UPDATE perch2_users SET userHash='0e3e79904743642047400674a783f1f0' WHERE userID=1
SELECT p.privKey FROM perch2_user_privileges p
SELECT * FROM (SELECT DISTINCT settingID, settingValue FROM perch2_settings WHERE userID=1 OR userID=0 ORDER BY userID DESC) AS settings GROUP BY settingID
SELECT * FROM perch2_content_regions WHERE regionID=714 LIMIT 1
SELECT * 
FROM perch2_user_roles ORDER BY roleTitle ASC
Using template: /templates/content/interactive/slider.html
Setting alert: Changing the template can result in data loss if the fields in the templates are not the same. (notice)
Queries: 7
Array

(

    [type] => 8

    [message] => Undefined index: path

    [file] => .../perch/core/apps/content/modes/region.options.post.php

    [line] => 263

)

• The full path on file => is my local computer path so I replaced it with a ...