Call to a member function get() on null - in items list

Hello.
I updated Joomla to version 5.4.3.
It's ok.
Then I updated FC from the latest version to FC  from the master branch.
Frontend is ok.
FC dashboard - is ok.
When opening items view in admin, error: Call to a member function get() on null.
I use the error log plugin, and it says:

Error Code0Error TypeErrorMessageCall to a member function get() on nullFile/var/www/user/data/www/site.com/administrator/components/com_flexicontent/helpers/html/fcitems.phpLine48ProtocolhttpsHostswooshlab.orgRequest/administrator/index.php?option=com_flexicontent&view=items
Referrer /administrator/index.php?option=com_installer&view=installMethodGET

I enabled Debug System and Maximum Errors - check screenshot.

hello that strange i can't reproduce it on my live site
if i check the code i can that a a problem with params
$allow_jview = $row->tparams->get('allow_jview', array('allow_jview'));
can you try to save flexicontent configuration and re test ?

can you try to save flexicontent configuration and re test ?

Of course.
Maybe it's some kind of plugins?
Actually, I installed a clean J5 + FC Master branch on the test site, and I don't see problems.
But it may be types, fields, or something else. 
I don't know how to identify the issue.

All right, I found. 
I don't know why and how, but some files was placed in the template override folder

Removing them resolves the problem.

 

thanks for return