[SOLVED] Front End Profile Edit Button Doesn't Work Tabs not displayed set to tab displa

Became aware of this problem today, do not recall what change could have caused it, site is stable and not undergoing development.
Page displayed from Userprofile(manditory) menu item has a Edit dropdown but nothing happens when you click it - there is a note at the bottom of the page "Run script "%20void(0);"
Page displayed from Userdetails menu item displays the profile properly with Update and Cancel buttons on bottom of page. Changes to the profile are successfully saved.
Can edit profiles from back end.

Another issue, perhaps related...
Tabs set to display as Tab Horizontal (Left/Right) do not appear on the front end in the Userprofile(manditory) page.
Tabs set to display as divs do appear.

Sounds like you've broken JS on the page causing a fatal JS error resulting in JS executed after it failing (e.g. the tabs rendering JS). You should be able to see such errors within your browsers developer tools (typically opens with F12) under the Console tab (they'll be red messages); be sure to refresh after opening to capture the errors. Try clearing Joomla cache as could just be broken JS cache from 3rd party Joomla template or a compression extension like JCH Optimizer. Switch to default Joomla protostar template and see if issue persists.

there is a note at the bottom of the page "Run script "%20void(0);"

Sounds like a javascript void link is messing up in your browser for some reason.

Thank you for your prompt reply, all the problems arose from JCH Optimize.