This is Mo Ram, I'd like to assure you personally. We take great pride in our support service and our clients appreciate the time and effort we put into Keeping Your Business Running Smoothly.
Let others know we love you.

For any blank page, please make sure you have enable php error printing on your server. Next add the following code to your WHMCS configuration.php file:
$display_errors = true;
This will help you to see the error output. Send us the full error so that we can suggest a solution. Remove the code when the problem is resolved.
Please make sure you have deleted all instances of installed Stripe modules. This includes all files and folders. Our module will not mysteriously stop working, there must be something that prevents the module from functioning. Please follow the steps highlighted above and we will be glad to resolve this with you.
WHMCS blank page troubleshooting: Learn more.

Invoices are automatically updated if the module webhook is configured properly and is listening to correct charge events on stripe.

To see if stripe is calling your webhook correctly, login to stripe.
From left side menu, find Developers > Events > from list of events find the event that corresponds to your customer charge.
Click on the event to drill into the details and event object.
Scroll to the buttom of the page, find Webhooks section. Here you should see list of webhook calls to the URL end point that you have registered with stripe.

eg: https://whmcsdomain.com/modules/gateways/callback/roudiappstripeach_webhook.php

Stripe will automatically try to call the webhook when a charge is succeeded or refunded. If the first call fails, Stripe will attempt automatically to call your end point three times.
A successful call to your end point will be marked with green status: Success. Click on your end point to see more details such as Status, Retry history and request object.

eg: Status: 200 Success (1 try), Status History: [2019/03/03 13:47 to https://whmcsdomain.com/modules/gateways/callback/roudiappstripeach_webhook.php]: (200) OK

If failed, you can click on your end point to inspect the feedback. same as above, you have access to status code, try history and request object. We will need the content for Status code, retry history and request object to help with investigation of a failed call to your webhook.

Stripe PHP Library needs Multibyte String PHP extension, enable this extension for PHP or ask your hosting provider to recompile your PHP with this extension.

With Stripe ACH, US merchants can charge US based customers in USD only.

Yes, an easy to follow Installation Document is provided to help you with the installation and configuration process. We also provide installation service, for more information please contact us.

Of course, yes! If you find our module not suitable for your need then we see no reason as why you should still pay for it! Let us know within 10 days and we will issue full refund.

As a small business your purchase means the world to us. We also appreciate free internet for a year or unlimited supply of free Mcvities hobnobs, Snickers bar and Magnum Ice Creams for life. However we can't afford to live on income generated from $25 products (minus the transaction fees, sometimes with discounts!).

We can't afford to provide answer to unlimited support inquiries for a year, stay online at all times and keep our products up-to-date all with the income from our affordable products.

We don't have a second job to pay our bills and this is our only source of income, therefore we need to charge for support and update services on monthly basis. This is optional and will enable us to provide reliable and steady service to our customers round the clock. It's in your interest that we will be available whenever you need us!

After all that's why you are here ;) Others were too busy to deal with your inquiries! We design simple but beautiful apps, they just work. Give us a try you won't be disappointed. All products are offered with one month free support and update.