SP Page Builder 5 sssues

Hi, I bought your SP Page Builder 5 component but it has serious problems. Let's start with the Text Box, to which we return and fix the box that opens with the three dots on the screen. Then the part of the Tab that if inserted in the same section of a Text Box causes the page to crash. At the same time, in some cases it is not possible to change the name "Tab" because the apply button is no longer visible. I also happened to create a Section with a Row inside with a Tab inside and I can't delete it anymore. Now I can't even edit the page in the FrontEnd, I'm left with a blank page.