Hi Daniel Colunga,
Good day to you.
We have checked your reported query that package not found error in MVC application. We sorted out the issue that we have not included the base and physical provider in the NuGet Package version (v17.1.0.46). We suggest you update the Syncfusion.EJ2.MVC5 NuGet package to the latest version (v17.3.0.14). It will resolve your issue.
For your reference, we have prepared a file manager sample. Refer to the sample link below.
Please let us know, if you have any concerns.
Regards,
Ashokkumar B.