Update failed: Download failed. No working transports found

I have curl and openssl extensions on.

Can you PLEASE CONFIRM that they are indeed LOADED for PHP 7.4.12? You can easily test this by running a phpinfo() file.

I’m not sure how WAMP works… but as explained on the OFFICIAL PHP documentation, the phpinfo(); function “outputs a large amount of information about the CURRENT STATE of PHP” (emphasis mine).

So if curl and openssl extensions are not appearing in phpinfo(); it simply means they’re not loaded… ie PHP is not aware of their existence… irrespective of what WAMP may be telling you.

You mentioned updating WAMP and PHP. Could it be that you have multiple versions of PHP on your computer now that’s causing this discrepancy?

You should check the Apache configuration and make sure the PHPIniDir setting is pointing to the correct php.ini file, and the correct php7_module file is being loaded in a LoadModule setting. I don’t know how Wampserver works, but updating PHP does not normally update Apache settings…they must be updated manually.

After insuring Apache is loading the correct files, make sure the php.ini file contains the following entry:

extension_dir = c:/wamp64/bin/php/php7.4.12/ext

and also make sure the appropriate extensions are being loaded.

Please check the c:/wamp64/bin/php/php7.4.12/ext directory for the existence of the two extension files. Windows PHP distributions name them php_openssl.dll and php_curl.dll. If those are the names of the files, then check php.ini and make sure you have the following two lines:

extension=php_openssl.dll
extension=php_curl.dll

The lines MUST contain the actual file name, not something like extension=openssl. The latter format is only valid with PHP 8.

I noticed that you posted a support request on the Wampserver site. If the above does not help, you’ll need to follow up there because this isn’t a WordPress issue.