Errors Informations.

[pinochico]

https://www.google.com/search?client=safari&source=hp&ei=5xW9X_n9M5HuaeG1s8gD&q=How+disable+PHP+message+to+HTACCESS&oq=How+disable+PHP+message+to+HTACCESS&gs_lcp=CgZwc3ktYWIQA1CcCVicCWC0FWgAcAB4AIABiQGIAYkBkgEDMC4xmAEAoAECoAEBqgEHZ3dzLXdpeg&sclient=psy-ab&ved=0ahUKEwi5jYS8r5vtAhURdxoKHeHaDDkQ4dUDCAo&uact=5

Thanks too

[jenkinhill]

Why not use Joomla's error report setting?  Tutorial here with pictures, of course, you don't want to set it to maximum but it shows where the setting is. 
https://www.joomlashack.com/blog/joomla/how-to-turn-your-error-reporting-to-maximum/

[MyDesigner]

I try to disable error with PHP, Virtuemart, Joomla and .HTACCESS... not function.

Can I return to previuous version of VirtueMart?

Thanks.

[MyDesigner]

Hi, I have upgraded to version 3.8.7 10378 and I have resolved errors but in customer order there is a new error:

Warning: Creating default object from empty value in .../home/administrator/components/com_virtuemart/helpers/calculationh.php on line 1214

Have you any solution?
Thanks.

[jenkinhill]

It is a PHP Warning. If it is displaying on the frontend turn off as advised above.

I also am testing 3.8.7 10378 (on PHP 7.4.12) and the same warning is recorded in the error log, but as it is a development version rather than a stable public release I do expect to see some minor issues.