Welcome to the Jazz Community Forum
After upgrading jrs, 500 error is thrown

One answer

This error can occur if the path of the shared libraries have not been updated to point to the new version of jrs.
Go to Websphere adminConsole -> servers -> server types -> Enterprise servers -> (server hosting jrs) -> shared libraries
confirm the path for the jrs libraries is pointing to the new install.
Go to Websphere adminConsole -> servers -> server types -> Enterprise servers -> (server hosting jrs) -> shared libraries
confirm the path for the jrs libraries is pointing to the new install.