Thank you for reporting this issue and I've logged this into our issue tracker.

Great, so this wasn't something I did..
Whoooooosh, at least we spotted an issue for everyone..

I've tried to access your site's FTP details but it's not working. For now to resolve this issue find attached file and replace it with the below-mentioned file path.
root\plugins\payplans\stripealipay\app\scaLib\Stripe\ApiRequestor.php

If that ever happened again, we installed ff explorer.
You can simply go to the backend and look for component ffexplorer and you can have access to a version of FTP, that might be useful.. Now I am wondering if that is a good thing to have on a backend website for security...hmmmmmmm

Please take a look at this issue again after applying the changes.
Update us if the still issue persists.

Tested and it seems to function properly..
Thanks for your expertise, @Manisha

Hey Ulysses,

Great, so this wasn't something I did..
Whoooooosh, at least we spotted an issue for everyone..

Yes.

If that ever happened again, we installed ff explorer.
You can simply go to the backend and look for component ffexplorer and you can have access to a version of FTP, that might be useful.. Now I am wondering if that is a good thing to have on a backend website for security...hmmmmmmm

Ok, No issue with it.

Tested and it seems to function properly..
Thanks for your expertise, @Manisha

You're most welcome.

If you don't mind and if it doesn't take too much of your time, is it possible for you to post up a review or give us some rating for Payplans at Joomla! Extensions Directory https://extensions.joomla.org/extension/payplans. This will really help motivate the team and will allow us to further improve our service as we move along.

Thank you for understanding!

If you don't mind and if it doesn't take too much of your time, is it possible for you to post up a review or give us some rating for Payplans at Joomla! Extensions Directory https://extensions.joomla.org/extension/payplans. This will really help motivate the team and will allow us to further improve our service as we move along.

Completed..... Thanks again @Manisha.

Hey Ulysses,

Thank you so much for your kind words.
It means a lot.

Thank you and Have a nice day!