Issue with Contextual Filters
You shouldn't need contextual filters for this as nothing needs to be passed in via the URL.

It should work like this using regular filters:


Create a node view
Add a relationship for "Content: Author"
Add a filter for "Content: Type" and restrict to the specific content type you refer to.
Add a filter for "User: Current" and set it to "Yes".  This will be using the relationship you defined in step 2.
Click the drop down next to the filter criteria heading and click "And/Or, Rearrange".
Change the operator for your 2 filters to "Or". Then you will see on the right it says current user or content type. Then click apply. - Note that if you have other filters set you may have to click the "Create new filter group" button then add these 2 filters to the new group then use "Or" within that group and "And" for the rest.