Publisher is EE6 compatible, but it does not support the Fluid field. Please do not contact asking when support will be available.
If you purchased an add-on from expressionengine.com, be sure to visit boldminded.com/claim to add the license to your account here on boldminded.com.
Ticket: Reel not working within a Grid Field
|Add-on / Version||Reel 1.5.3|