I'm using the "Points to path" processing tool. It works fine but it is not saved when I exit QGIS. It shows up in layers panel but not on screen on restart. I tried making the scratch layer permanent and got this error message
Could not make temporary scratch layer permanent.
Error: Creation of data source failed (OGR error: sqlite3_open(arrows.gpkg) failed: unable to open database file)
I don't know enough to interpret the error or correct it. I presume I'm doing something wrong when I initiate Point to path but cannot see any obvious options to correct.