Hi, seems you may have some currupt files or some files that the ext did not write correctly to the server such as .htm or .ph or .j instead of .html or .php or .js Its probably a js file since object object is js related
so per this https://developers.oxwall.com/forum/topic/48871?page=4
try this
after replacing all the .js in ow_static/plugins/base and admin, with the files from the upgrade pack, everything is fine ! I think it was a problem with automatic upgrade...
Also check the forum dir files to be sure they are all correct with proper ext..