Magento 2.3.2 CE – Cannot Access Extension Manager


When I try and access the Extension manager, it just hangs with a ‘Please Wait’ message, and then, after a few minutes, a red warning box appears with no message in it.


There is an error in the browser from angular.jserror2.jpg

All my keys are correct. Would it be worth resetting them?


I have tried this solution which seems to appear on a lot of forums – replacing my repositories in composer with this code.

"repositories": [
        "type": "composer",
        "url": ""

All this does is throw up an error about composer – 

error3.jpgDoes anyone have any other insights about how I gain access to Extension Manager?

Thanks in advance.