Email template not being updated

-- HikaShop version -- : 4.0.3
-- HikaSerial version -- : 3.0.1
-- Joomla version -- : 3.9.5
-- PHP version -- : 7.2
-- Browser(s) name and version -- : various - all updated
-- Error-message(debug-mod must be tuned on) -- : None

Under the Hikashop / System / Emails, I've encountered an issue.

Subscription expired - saved properly

Subscription expiration notice - did not save properly

www.divorcetoolbox.com/administrator/ind..._hikashop&ctrl=email

Request URL: www.divorcetoolbox.com/administrator/ind..._hikashop&ctrl=email
Request Method: POST
Status Code: 404 Not Found
Remote Address: 198.1.81.235:443
Referrer Policy: unsafe-url

I've tried to 'Save' as well as 'Save and Close', both with the same issue.

I've clear website admin / site cache as well as browser, optimized / repair all HikaSerial / HikaShop tables No luck!

I need to add a Subject and a BCC to the template.

Any ideas?
.

Jerome,

I opened each email template and clicked "Save and Close" . The ones that saved properly are marked 'Yes' and the ones that goes to a predominantly blank site page as shown below.

1 Cron report Yes
2 Order administrator notification No
3 Order creation notification No
4 Order status notification No
5 Order notification No
6 Payment notification No
7 User account Yes
8 User account administrator notification Yes
9 Out of stock notification Yes
10 Order cancel Yes
11 Wait list notification Yes
12 Wait list administrator notification No
13 New comment Yes
14 A contact request has been made No
15 Subscription expired Yes
16 Mass action notification No
17 Wishlist sharing notification No
18 Serial: Mail to custom field No
19 Serial: Pack quantity low No
20 Subscription expiration notice No

Jerome,

So I set error reporting to Maximum and when through the process. After I click Save and Close, it goes to that blank page and no error is displayed. So I cleared admin website cache, went back to the email template to change and made no changes, then clicked 'Cancel'. It went to the same blank page.

I do get this message display:

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; plgHikashopAddBcc_status_email has a deprecated constructor in /home/divotlbx/public_html/plugins/hikashop/addBcc_status_email/addBcc_status_email.php on line 12