1. I have sent error files from the logs folder on the hosting here https://skr.sh/sBUaGNvpdTN.
2.Yes, I use these plugins and they are included in the template https://skr.sh/sBUpx64jLBt. It turns out they should be compatible with the template!
3.It is impossible to edit the template here https://skr.sh/sBUjva6oBCN!