Indexmenu Plugin: If you use the 'js'-option of the indexmenu plugin, you have to disable the 'defer_js'-setting. This setting is temporary, in the future the indexmenu plugin will be improved.

TypeError: Cannot access offset of type string on string

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

More info has been written to the DokuWiki error log.