Ask a question not work - 500 VM 3.8.9 10534

[2dmaster]

Hi. i install com_virtuemart.3.8.9.10534_package_or_extract latest.
Ask a question button not work in popup and in new window with error 500

details:
Error: 0 - Call to a member function trigger() on null
site/product3-detail/askquestion?tmpl=component

php: 7.4.19 Joomla! 3.10.2  VirtueMart 3.8.9 10534

i understand, but for me this not needed today