Hello, we have just installed the Quickstart Joomla 3 V.2.0.0 template on a server.
PHP version 7.4.23 it all works until you edit a page in the SP Page Builder e.g. Home -> Frontend Editor -> click Angeled Pixie heading -> Slidshow 8Full width) -> General -> Slide Background Image, the existing demo image is displayed here ( images / 2018/07/19 / slider1.jpg) exchanged for another and saved, the error 0 object of class stdclass could not be converted to string is already present.
Please clean up, this is a PHP programming error.
best regards
Gert