LAYOUT DEFAULT_TYPE_STANDARD NOT FOUND.

-- HikaShop version -- : 4.3.0
-- Joomla version -- : 3.9.21
-- PHP version -- : 7.4.10
-- Browser(s) name and version -- : Chrome 85.0.4183.121
-- Error-message(debug-mod must be tuned on) -- : LAYOUT DEFAULT_TYPE_STANDARD NOT FOUND.
The page you are looking for was moved, removed, renamed or might never existed.

After installation of HikaShop Business: 4.3.0
I get this error on the website:
LAYOUT DEFAULT_TYPE_STANDARD NOT FOUND.
The page you are looking for was moved, removed, renamed or might never existed.

Please let me know how to resolve.
Thank you.

1. Did you had an older version of HikaShop installed before ? Which version was it ?
No.

2. Are only the pages of HikaShop affected or the whole website ?
Some pages only. Before entering a Hikashop page, some pages cannot load.
After entering the Hikashop page, the pages can load.
It looks like it is dependent on the session time, as it will have this issue again after certain hours if I do not visit the page.

3. Could you provide a link to a page with the issue ?
Prefer not to as they are some sensitive info.

4. Could you activate the "debug mode" and "error reporting" settings of the Joomla configuration and try to access a page with that error message ?
The page does not load any debug info.

5. It should then display more information on the issue. Please provide a screenshot of all the information on the page.
I have provided a screenshot of the problem page.
Btw I am using a template from Joomlashine called Reta Pro (Jsn_reta2_pro).