Sometimes if you have installed a program that associates itself with the .js file extension, you will see the following error when you try and record/play a Rapise test:
Unfortunately, Windows10 has a nasty habit of frequently updating itself and then breaking existing applications. We found that the February 14th, 2018 Windows10 update corrupted the Excel device driver that Rapise uses to access the RVL test script spreadsheet during playback.