please initially compare your config.js in the html/js folder with the one in
the repository and add finally following line at top of the file:
var config_struc_ver = 20210312.1;
<p>This text is shown to you, because you may use an old config.js-structure. Please open your config.js and compare it with the example-one in github-repository, add missing or change configuration options that has been renamed and add following line (or update existing one to this) into the config.js-file:</p>
<p>
var config_struc_ver = <scripttype="text/javascript">document.write(act_config_struc_ver);</script>