After spending a few minutes trying to figure out why the admin folder of a WordPress installation was displaying a blank page and not letting us login to the admin panel, we found the source of the problem. Even though the site worked just fine, no admins could not do any work all of the sudden.

Turns out that disabling all plugins not always solves the issue. The problem for some was extra spaces in the wp-config.php file. For others, some extra spaces in the wp-functions.php file.

After staring at our wp-config.php file for a while, there it was. A very small thing at the beginning of the file. Something really small that we missed a couple of times when we opened that file trying to find a solution. I thought it was something on the monitor screen but no. It was a simple dot. A small character that looks just like the little thing at the end of this line.

There you have it. Make sure that when disabling plugins are not enough. Look for any extra spaces or just any extra character that shouldn’t be on that file.