idk what is this error

when I open the terraria by steam it installs the .net framework (which I already have) but when I try to open it again, it asks to install again, and when I open it directly through the folder, it appears:

"To run this application, you must first install one of the following .NET Framework versions
v4.0.30319
Contact the application editor for instructions on obtaining the appropriate version of the .NET Framework"