When I started work with Linux operating system, I spent too much to solve this problem of Adminer.
Finally, I have found following command what saved me!
When we work with cURL sometimes we get an error like “cURL error 60: SSL certificate problem: unable to get local issuer certificate guzzle”.
I spent much time and finally found a solution:
Download .pem file from here (https://gist.github.com/VersatilityWerks/5719158/download) and put cacert.pem file in a directory.
$client = new \GuzzleHttp\Client();Enjoy!
$client->setDefaultOption('verify', 'C:\Program Files (x86)\Git\bin\curl-ca-bundle.crt');