Magento 2 extension manager 500 error

[varulv]

I'm trying to install extensions using the extension manager, I have my access keys set, when entering the extension manager page, it's always stuck on "Please wait". The console log shows the below:

Failed to load resource: the server responded with a status of 500 (Internal Server Error)
angular.js:533 Possibly unhandled rejection: {"data":"","status":500,"config":{"method":"GET","transformRequest":[null],"transformResponse":[null],"jsonpCallbackParam":"callback","url":"index.php/extensionGrid/extensions","headers":{"Accept":"application/json, text/plain, */*","Cache-Control":"no-cache, no-store, must-revalidate","Pragma":"no-cache","Expires":0}},"statusText":"Internal Server Error","xhrStatus":"complete"}
(anonymous) @ angular.js:533
/setup/index.php/extensionGrid/extensions:1 Failed to load resource: the server responded with a status of 500 (Internal Server Error)
angular.js:533 Possibly unhandled rejection: {"data":"","status":500,"config":{"method":"GET","transformRequest":[null],"transformResponse":[null],"jsonpCallbackParam":"callback","url":"index.php/extensionGrid/extensions","headers":{"Accept":"application/json, text/plain, */*","Cache-Control":"no-cache, no-store, must-revalidate","Pragma":"no-cache","Expires":0}},"statusText":"Internal Server Error","xhrStatus":"complete"}
(anonymous) @ angular.js:533
angular.js:12571 POST https://website.com/setup/index.php/session/prolong 500 (Internal Server Error)
(anonymous) @ angular.js:12571
n @ angular.js:11748
(anonymous) @ angular.js:11263
(anonymous) @ angular.js:6988
$digest @ angular.js:8414
$apply @ angular.js:8817
(anonymous) @ angular.js:12941
23angular.js:12571 GET https://website.com/setup/index.php/session/unlogin 401 (Unauthorized)

Help please

[Manish Mittal · Accepted solution]

@varulv 

There can be different reasons for 500:

Just check required permission to folders are correct or not. 

2. increase the php memory_limit 

3. check curl extension installed or not at your server.

Or which extension are you trying to install, there are different method to install it so you can try manual process for now to install it. Thanks

[Bhanu Periwal]

Hi @varulv 

When facing a 500 error the first thing you should do is search for your webserver error log.

When running on apache it can mostly be found in one of these 2 locations:

/var/log/httpd/ -> centos, archlinux ...

/var/log/apache2/ -> debian, ubuntu ...

It may help!
Problem Solved? Please click on 'Kudos' & Accept as Solution!

[varulv]

All my attempts failed, so I guess I will just use the manual method.

[Manish Mittal]

@varulv Yes for now dont block yourself and go ahead with manual.