Error messages

What does the message "Could not find package..." mean?
Problem The Composer installation of a module in Magento 2 fails and the following error occurs: Could not find package ... at any version for your min...
Mon, 8 May, 2017 at 11:21 AM
What does the error "main.CRITICAL: Broken reference: No element found..." mean?
Problem After installing a Magento 2 module, this error occurs in the checkout: main.CRITICAL: Broken reference: No element found with ID 'checkout...
Tue, 9 May, 2017 at 3:03 PM
What does "TypeError: ... is not a function" mean?
This indicates that a JavaScript function couldn't be found. Most likely, a custom checkout is being used and not all JavaScript files from our m...
Wed, 3 May, 2017 at 9:05 AM
What does "Exception printing is disabled by default for security reasons" mean?
Problem The following message is shown in the browser: Exception printing is disabled by default for security reasons. Error log record number xxxxxxx...
Wed, 1 Mar, 2017 at 12:22 PM