Frame around the text not disappearing - please help

Hello everyone,

I have a problem with frames being created around every single text I add into the document. They don't dissapear even in the preview. It doesn't look like it's a stroke cause when I select the text it says 'none' in the stroke section. Here is a photo (the frame is even around the page number 😞

I wil appreciate any help!

Thanks in advance 🙂