Hi @sirrahikkala,
Can you please send us the Feed URL in question so that we can try it ourselves from our end?
Also, what exactly the error you got was? Can you please send it here?
Lastly, have you tried it on another site and did you encounter the same cURL 51 error? You can also try it on one of our demo sites https://www.wprssaggregator.com/demos/ and see if the problem come up there.
Hi @sirrahikkala,
We apologize for the delay in replying due to a high load in our Premium Support Channel lately.
We have then tried to fetch your Feed URL https://www.sciencedaily.com/rss/plants_animals/dogs.xml on our end and we are able to import it, please see the result in the screenshot below:

Have you been able to fetch it since then? If you’re still not able to, please give it a try somewhere else (or on our demos) first.
If you can get it works on another site, then you might have a problem with your hosting provider. Therefore, we recommend you speak with them regarding this issue.