I see no one from Autodesk ever answered you, but I’m going to add my experience to the thread in the hopes that someone will take a look.
Basically, I’m running into the same issue. I’ve only been using Fusion personal edition since Dec 2019, but have never been able to insert components into any of my assemblies. To do anything, I’ve had to create every nut, bolt, screw, component, etc from scratch within each assembly file.
Heres the steps to reproduce:
1. Create a new project.
2. Under the “People” tab, verify that I’m the moderator.
3. Save the default document as “xxx-assembly”
4. Create a new document with the plus button.
5. Draw a cube and save as “component”
6. Click back to the assembly document.
7a. Click on the “component” file in the dashboard and try to drag it. It highlights, but won’t drag.
7b. Right click (control click on a Mac laptop) the component file in the browser, choose “Insert onto current design” and click in the assembly.
Result of both 7a and 7b is the same. Nothing gets inserted.
This happens 100 percent of the time. I’ve never been able to import anything I create into projects I also create. Seems like a pretty serious bug.
Here’s my system info:
2017 MacBook Pro pro 13 inch
Processor: 2.3 ghz Intel core 5
Memory: 8gb 2133 MHz LPDDR3
Graphics: Intel Iris plus graphics 640 1536 mb
Storage: 261 gb
OS version: MacOS Mojave 10.14.6
No peripherals, Comcast lower tier internet connection.
Fusion info version: 2.0.8176
Active plan: Fusion 360 personal
No plugins or extensions added