dokuwiki\Exception\FatalException: Declaration of syntax_plugin_datatemplate_list::nullList($data, $clist, &$R) must be compatible with syntax_plugin_data_table::nullList($data, $clist, $R)

An unforeseen error has occured. This is most likely a bug somewhere. It might be a problem in the datatemplate plugin.

More info has been written to the DokuWiki error log.