Malfunctioning Snap Margins to Text Frame script

When I create a text frame on a master page in order to later use the Snap Margins to Text Frame script to create margins, something goes wrong. It used to work perfectly before, and the margins were exactly the same size as the text frame. Now it creates something like what you can see in the photo. I reinstalled the script and reset InDesign, but it didn’t help.
Sorry for my English.