When searching for music or graphics if you see  "API request is invalid" or "No data returned from search" error messages when searching for PLUS music or graphics files within ProSelect, then you should update to ProSelect version 2018r1.7 (or newer).  This release, due out in late August 2018, includes changes to keep ProSelect compatible with updates made to the PLUS downloads server on August 13, 2018.

If your PLUS is current, then this ProSelect update will be a free download for you. If your PLUS is not current, then you won't be able to access these PLUS resources and so you will not be affected by this issue.