My problem might be somewhat similar to the following one: Retrieving lost data from QGIS. However, I need some further clarifications:
I then closed everything, restarted my computer and opened up the program again. When I tried to enter/open the same project, I recieved the following error message (see pic 2). The error message says: "error occurred while parsing element on line 1 column 1 for file C:/Users/H..."
Have I lost the project and need to redo all the operations for this project (all of my analysis in QGIS)?