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Based on Datenstrom - Troubleshooting, it looks like to turn on debugging, you need to edit system/extensions/core.php such that it says <?php define("DEBUG", 1); (The <?php may or may no...
Answer
#1: Initial revision
Based on [Datenstrom - Troubleshooting](https://datenstrom.se/yellow/help/troubleshooting), it looks like to turn on debugging, you need to edit `system/extensions/core.php` such that it says <?php define("DEBUG", 1); (The `<?php` may or may not be on the same line as the `define` directive; that's inconsequential here, but make sure to not introduce whitespace before it.) Doing so should cause it to emit more debugging information, possibly to `system/extensions/yellow.log`.