the pluginfreetag is not compatible with HTTPS connections and causes mixed content in the backend.
In line 897 of the file seredenipty_event_freetag the following script tag is hardcoded:
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<script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js" type="text/javascript"></script>Code: Select all
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js" type="text/javascript"></script>