I just update my shop to J4.4 and VM 4.2.4
When I go to a product detail page I get an error:
count(): Argument #1 ($value) must be of type Countable|array, string given
Strangely, I get this only in Firefox, but on a other machine Firefox just displays the page correctly.
Any idea how to solve this?
edit: now I get it other browsers as well