Joomla 3.9.16 and user registeration with virturemart

[KianWilliam]

To whom it may concern:
I updated joomla site to 3.9.14 version of joomla then after a spell of time to 3.9.15 and 3.9.16. It seems vm user registeration does not work with version 3.9.14 of joomla and later versions after that. I went through the files and by commenting two lines in user view of vm: view.html.php make it run right again.
lines: 282-283 $this->params->get('showUserShopperGroup', 0); and the following if condition after that
line: 358 $this->allowReisterVendor=1 which I assigned value 1 instead of getting a value from params which is null.
In the next update of vm these changes shall be gone,
Is there a fix for that, or a plugin that I have to upload in regard with that? I checked all config backend and I found no related setting to make $this->params->get() works and not to be null.
I am using last version (updated version) of vm. Joomla version is last too: 3.9.16
Kian William

[Studio 42]

Get beta from http://dev.virtuemart.net/projects/virtuemart/files
Or add a menu link to virtuemart user account

[KianWilliam]

ok, thanks
Kian William