[Koha] Problem with printing labels

Good afternoon, I am experiencing the following problem when trying to print labels. (attached image) unnamed.png <https://drive.google.com/file/d/1XAafLUfSLx75D6ny8crBduDhkH27xuOn/view?usp=drive_web> What would be the solution to solve this problem? I'm using Ubuntu 20 and Koha 20.05.04. Victor