I am running trial version 6.8.3. 

Problem: On Install plugins page I can't enter URL of the plugin. The field where URL should be entered is missing. 

I tried to open the page with the firefox and chrome. 

 

Any idea how to fix this?

 

Which plugin are you trying to install? Community Applications should be the first plugin you install, then use it (the Apps page) to install any other plugins or dockers. 

Do you have any adblock or anything else that might be preventing the page from working? 

It looks like the field is there.   Have you tried to click just above the line.

Thanks Squid, that resolved my issue. 

Field is present on Install plugins page, but invisible. 

 

trurl, I was trying to install CA plugin. 

On FF I do not use any extension, so no adblocker. 

 

Many thanks to all.