I put up our "new to us" pop up and discovered a problem in the front corner. It was slightly obscured by the curtain the previous owner had hung, so idk if it was already there or if it ripped when i put it up. He said it was in "perfect condition" before i took possession. Anyway I want to add some pics to show what i mean. Does anyone have an idea how to fix? I started with far away pics then got closer. The canvas is stitched to the rubber strip and the strip ripped as if perforated by the stitching.