"No transport undefined" error on Registration page

Since recently, I have been getting "No Transport No Transport undefined" error message on Registration page. Not sure if that has anything to do with forcing https and the recent changes made to my .htaccess file...
Please check: https://safaautoparts.com/index.php?rou ... t/register
Anybody with any idea why this should be happening?
Nick

- What OC version?
- What theme?
- What extensions?

It's most likely your checkout extension or another extension related to transport.

Not sure if that has anything to do with forcing https and the recent changes made to my .htaccess file...

File unposted.

Thanks. I will have to check if TNT shipment module is doing this. I am also in the process of checking with my template developer. Once I check this I will post back here for future reference.
I am using the latest version of Opencart Version 3.0.2.0.
Thanks

I have got a reply from my TNT shipment module developer:
Don't confuse "No Transport" with shipping. Even if you disable the TNT shipping, you still get the error so it's unrelated. Google Search "jquery no transport" or "jquery no transport undefined".
So, I guess it's nothing to do with shipment settings, but apparently, with jquery.

I have the same problem now. No new module installed, the add to cart and checkout functions are not working. In the admin, System/Maintenance/Error Logs, I have the following error: "2019-02-08 10:15:44 - PHP Notice: A non well formed numeric value encountered in /home/thecosme/ocartdata/storage/cache/d8/d83847ea64bc1cfb86c688a863d6311b3fc921e092b99d92fcff6bd8789fd4b8.php on line 3660"
Opencart version is 3.0.2.0.
The error is the same for the Default Opencart theme, or for the installed theme, Journal 2.
This error appeard out of nowhere, everything was working fine, then the error just poped up

I managed to fix it, I remembered I have changed some values in the jquery-2.1.1.min.js, the XML http into XML https, as reported by chrome dev tools, it was generating some warnings. Since then I started having these Transport errors. All good now...

Please, can you put me through how you got this resolved? I am having the same problem. Thanks