Using Spaces with Laravel - cURL Error 60

I am attempting to connect to a Digital Ocean Space from a Laravel 8 webapp using PHP 8. Whenever I try to upload a file, I get this error:

Aws\S3\Exception\S3Exception

Error executing "PutObject" on 
"//[MY-SPACE-NAME].ams3.digitaloceanspaces.com/[MY-SPACE-NAME].ams3.digitaloceanspaces.com"; 
AWS HTTP error: cURL error 60: SSL: no alternative certificate subject name matches target 
host name '[MY-SPACE-NAME].ams3.digitaloceanspaces.com' 
(see https://curl.haxx.se/libcurl/c/libcurl-errors.html) for 
https://[MY-SPACE-NAME].ams3.digitaloceanspaces.com/[MY-SPACE-NAME].ams3.digitaloceanspaces.com

Here is my config file:

'spaces' => [
    'driver' => 's3',
    'key' => env('SPACES_KEY'),
    'secret' => env('SPACES_SECRET'),
    'endpoint' => env('SPACES_ENDPOINT'),
    'region' => env('SPACES_REGION'),
    'bucket' => env('SPACES_BUCKET'),
]

… and my .env file:

SPACES_KEY=****
SPACES_SECRET=****
SPACES_ENDPOINT=ams3.digitaloceanspaces.com
SPACES_BUCKET=[MY-SPACE-NAME]
SPACES_REGION=ams3

If I add “https://” to the start of the endpoint, it seems to want to prefix the space name before the protocol, ending up with this: [MY-SPACE-NAME].https://ams3.digitaloceanspaces.com, which obviously throws up another error (cURL error 1).

In the other threads I’ve seen relating to this issue, the suggested solution has been to either uppercase the region (which has no effect in this case) or add ‘https://’ to the endpoint, which doesn’t work either. Prefixing ‘https://’ to the space name yields the correct URL but the same error: cURL error 60. Usually this problem occurs on Windows-users’ local dev environments, so I can’t figure why this is happening in my case (both in my local dev environment on macOS and on a server running Ubuntu.

Some assistance would be most appreciated. Thanks.