How to fix package loading errors in Scala?

To resolve the issue of Scala failing to load packages, you can try the following steps:

1. Check whether the package path is correct: Ensure that the required package is in the right path and the package name used in the code is correct.
2. Check package dependencies: Make sure that if the code references other packages, they have been correctly added to the project dependencies. Project dependencies can be managed through build tools like sbt, Maven.
3. Clear cache: Sometimes the Scala compiler may cache information for certain classes or packages, which can lead to errors when loading packages. You can try clearing the compiler cache and then recompiling the code.
4. Check the visibility of the package: Ensure that the access permissions of the package are set correctly. If the package is private, make sure that the places in the code where it is used have permission to access the package.
5. Check package version compatibility: using a package in the code that is incompatible with the Scala version used in other parts of the project may lead to loading errors. Make sure all packages used are compatible with the Scala version.

If none of the above steps have solved the issue, consider rebuilding the project or using a different IDE to write and run Scala code.