error SP Buldier and the Spectrum template

Could you support me? I have been working with my SP Buldier and the Spectrum template but it works worse every time, pages that I had already finished like the US page, that's the name of the page, I uploaded an image, I gave it a save, it took a while to respond and now it sends me a message 0
Object of class stdClass could not be converted to string and it does not show anything, it is blank, I try to modify some other page and when I click on save, it shows a 403 error and it does not save anything at all, and it is not possible to continue and I cannot advance, please tell me What I can do. Do I download another template? or what they advise me.