Uploading SCORM package to LMS - Encountered Error Message - Anyone else?

Dear Articulate Heroes,

I am a raving fan of Articulate development tools for a LONG time.... from their very inception.  I very rarely encounter an error or issue.  However, yesterday, while uploading a SCORM 1.2 package to update a course to my LMS, I encountered the following error message:

{"message":"Call to undefined method Illuminate\\Validation\\Factory::is_valid()"}

So, my question is... has this error ever occurred in your experiences?  If so, what did you do? (I've republished multiple times; renamed the file.... and the result is the same, the SCORM package doesn't replace the pre-existing course).  Thanks for your gray matter!

 

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