QueryString::buildUrl causes error.

For me, this fixes the error.

Created patch for the 2.x-branch

reviewed! Patch #3 working on my end. Thanks!

Setting to RTBC, per @Jaspreet-Kaur ... we continue to need and use this patch.

$get_params->all('page') throws a BadRequestException error in some instances.
The all() method in the ParameterBag class in Symfony checks if the value associated with the key is an array, If the value is not an array it throws a BadRequestException
Symfony\Component\HttpKernel\Exception\BadRequestHttpException: Unexpected value for parameter "page": expecting "array", got "string"

I'm adding an updated patch to set the $current_page $current_page = $get_params->all()['page'];

Fixed in 2.x and 3.x