Hi there, I added the plugin for Find and Replace.
Kristin Erken
1

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.

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