Object reference not set to an instance of an object. Pro 2021.4.4 
Autor: Jon M.
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I started building a site using X5 Evo, and realized I needed a feature in Pro so I upgraded. I am now unable to open the websuite buit in Evo. When I do, I get the error "An error occurred while loading the Project. [Object reference not set to an instance of an object.]". I was able to successfully load the other sites built with Evo.
I am using X5 Pro 2021.4.4
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Hello. If you have opened a project in Pro at least once, you will not be able to use it in Evo. This is how the program works.
Jon, if you copied the project from a version of evo into the curremt working directory a file may have gotten overlooked. Can you open the project in Evo still?
If so, go to step 5 and export project to create an iwzip.
Now in WX5 pro import the iwzip file and there should be no issue.
Autor
Thanks - exporting from Evo worked.