Dear Stefano,
I enjoy your Plugin,sorry for disturbing you with the same problem as last time but I can’t create a Newsletter with the Responsive Drag & Drop Composer. Sadly there is the same error only sometimes. There a download window where it trys to download something. And an another window where it says: C:\Users\john1498\AppData\Local\Temp\?????.php.part could not be saved because the source file couldn’t be read. So my question: Is there a relation between those two Composers, because the WPBakery Composer stuck in 5.0.1 but there is already the version 5.4.5 available and I can’t update because of a missing license.. Or how can I fix my problem otherwise?