Hi there, I added the plugin for Find and Replace.
Kristin Erken

Hi! You may have connected the button in the code incorrectly.
You need to connect the image of the button and define it in functions, so that it works. Besides, I do not know what js you’re using and, possibly you need to additionally connect js-files and libraries.
And be sure to check the dependencies of your plug-in on others. Perhaps to connect your plug-in, third-party CKEditor plug-ins are needed, so they also need to be implemented putting dependencies on the download and the code.
Additionally, some CK plug-ins are redefined in Drupal 8, and so you can use them only from Drupal, and if you use others you can expect errors.

One clap, two clap, three clap, forty?

By clapping more or less, you can signal to us which stories really stand out.