Shinichi Tokuyama

This question does not care about the error itself. I have a problem that the screen does not update when an error occurs.
There are other things, but I will raise two representative ones.
The first is the case of wpdm premium package plugin,
The second one is the case of wpdm stripe plugin.
I mentioned that it was not handling errors with ajaxSubmit in the first question, but I also believe that jquery.post has not been error-handled.

■The first one.
* plugin
wpdm premium package ver.4.0.3
* file
wpdm-premium-packages⁩/templates⁩/⁨checkout-cart⁩/checkout-login-register.php
* line
162-178
* Error generating method
It sets multibyte strings at intput[name=”wpdm_reg[user_login]”] .
And “REGISTER” button press.
* Error
Server returns Internal Server Error(HttpStatusCode=500).
* Display
The caption of the register button is changed from “REGISTER” to “PLEASE WAIT …”, the display will not change all the time.

■Second one.
* plugin
wpdm stripe ver.1.3.2
* file
wpdmpp-stripe⁩/wpdmpp-stripe.php
* line
362-368
* Error generating method
1) There exists a user set to meta_key = “__ wpdm_stripe_customer_id” in the wp_usermeta table.
2) User 1) does not exist on stripe.com.
3) In this state, press the PAY NOW button.
4) Enter card information and press payment button.
* Error
Server returns Internal Server Error(HttpStatusCode=500).
* Display
It does not change all the time since “Verifying Card ….” is displayed.
* Supplement
I forcibly generate an error, but for some reason an error may occur from the server.
For this reason, I believe that error handling is necessary.