From @chrisShick on April 25, 2016 20:44

This is a (multiple allowed):

• bug
• CakePHP Version: Current Release.
• Platform and Target: apache on xampp with php7

What you did

I have not done any php backend things yet. I have merely been styling the app before I get started on the back end.

Expected Behavior

Everything was working just fine and then suddenly I get this error:
Fatal error: Class Cake\Chronos\Chronos contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (DateTimeInterface::format) in C:\xampp\htdocs\vw\vendor\cakephp\chronos\src\Chronos.php on line 50

Copied from original issue: cakephp/cakephp#8708