No buckets visible after resetting plugin due to error

Wordpress notified me of an error with this plugin recently using the new built-in error notification feature. Here’s what they sent:

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When seeking help with this issue, you may be asked for some of the following information:
WordPress version 5.4.1
Current theme: Tiny Forge Child (version )
Current plugin: DreamObjects Backups (version 4.3.0)
PHP version 7.3.15

Error Details
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An error of type E_ERROR was caused in line 195 of the file /home/user/mywebsite.com/wp-content/plugins/dreamobjects/vendor/aws/aws-sdk-php/src/WrappedHttpHandler.php. Error message: Uncaught exception ‘Aws\S3\Exception\S3Exception’ with message ‘Error executing “PutObject” on “https://objects-us-east-1.dream.io/mywebsite_com/mywebsite.com/2020-05-30-122226.zip”; AWS HTTP error: cURL error 60: SSL certificate problem: certificate has expired (see https://curl.haxx.se/libcurl/c/libcurl-errors.html)’

GuzzleHttp\Exception\RequestException: cURL error 60: SSL certificate problem: certificate has expired (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) in /home/user/mywebsite.com/wp-content/plugins/dreamobjects/vendor/guzzlehttp/guzzle/src/Handler/CurlFactory.php:201
Stack trace:
#0 /home/user/mywebsite.com/wp-content/plugins/dreamobjects/vendor/guzzlehttp/guzzle/src/Handler/CurlFactory.php(155): GuzzleHttp\Handler\CurlFactory::createRejection(Object(GuzzleHttp\Handler\EasyHandle), Array)
#1 /home/user/mywebsite.com/wp-content/plugins/dreamobjects/vendor/guzzlehttp/guzzle/src/Handler/CurlFactory.php(105): GuzzleHttp\Handler\CurlFactory::finishError(Obje

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It seemed like there was some issue with a certificate expiring, so I figured I would just reset the plugin and reconnect everything. I reset the plugin, added back in my keys, but now if I go to the Backups page and click the bucket selection dropdown, there are no buckets visible. I even created a new test bucket and that doesn’t show up. I cleared the cache from my WordPress caching plugin along with the cache in Cloudflare, but still the same problem.

I also did the same on another one of my sites and had the same issue.

Any suggestions? Thanks!