Stripe payment_intent issue WHMCS ver.8.9

[Achievement In Motion]

So heres the thing. I have tried to narrow down the issue in order to get the best help I can get from you guys since Stripes Discord was telling me to reach out to WHMCS . So I am hoping someone here has some information or has been through this and may be able to guide me. 

I can confirm the following:

• Payments work when you pre-create a profile and save the credit card information (so Stripe captures the card) before checking a product out. 
• Payments work using Google Pay, and Link (was unable to confirm Apple Pay due to not having an iPhone readily available during these tests)

I can confirm the following does not work:

• Payments do not go through when checking out and typing in the card information manually.  What does occur is an infinite loading loop rather than a payment confirmation and account creation. 

When checking stripe in multiple areas, this is what I was able to find:

• Under the payment tab, I can see that the clients' email was captured and the invoice amount (and when you click on the incomplete payment you get the following log - PaymentIntent status: requires_payment_method)

Basically, it just doesn't read that credit card information was added to the field. 

• When checking the developer log for failed events, this is what I get: (Some items were redacted such as ID information.)

• GET /v1/account
  Status 403 ERR
  API version 2023-10-16
  Source Stripe/v1 PhpBindings/13.7.0 WHMCS/8 (https://www.whmcs.com)
  
  secret_key_required
  Looks like you forgot to include an API key in your request.
  
  You can find a list of your configured keys on the API keys page.
  
  Response body
  {
    "error": {
      "code": "secret_key_required",
      "doc_url": "https://stripe.com/docs/error-codes/secret-key-required",
      "message": "This API call cannot be made with a publishable API key. Please use a secret API key. You can find a list of your API keys at https://dashboard.stripe.com/account/apikeys.",
      "request_log_url": "https://dashboard.stripe.com/logs/req_xxx",
      "type": "invalid_request_error"
    }
  }

  And under events, I get the  payment_intent.created and customer. created but that's it.  It seems to only be isolated to using credit cards for the first time or single-use purposes outside of capturing it via WHMCS customer portal, or one-time Apple Pay, Google Pay, or Link payments. (This is assuming Apple Pay also works given my findings thus far.)

 

[Achievement In Motion]

I was able to narrow this down to the template I was using because when I switched back to the native whmcs theme and checkout template it works. Any ideas where I can look for the code causing this issue?

[Achievement In Motion]

Resolved the issue. Updated the order forms and flushed the cache.