Error when editing 'Terms and Conditions' in single store mode

[rikwillems]

After creating a new term and condition and you go and edit it you get an error. See full trace attached.

1 exception(s):
Exception #0 (Exception): Warning: htmlspecialchars() expects parameter 1 to be string, array given in vendor/magento/framework/Data/Form/Element/AbstractElement.php on line 286

Preconditions

1. Magento 2.1.2
2. Single store mode enabled

Steps to reproduce

1. Create a term & condition
2. Edit this term & condition

Expected result

1. Edit screen

Actual result

1. See attached

stacktrace.txt

[veloraven]

@rikwillems thank you for your report.
This is a duplicate for #7171 so I'm closing it.