I have a QGIS file with about 10 layers (shape files, web and a joined csv). Every time I close the file and open it, all layers are unlinked and the 'Handle Bad Layers' dialog appears. Needless to say, its tedious to relink every time and this behavior was not there earlier.
I've not changed the location of any of the layers. In fact, I tried moving them all to one location and then relinked them, but after I shut and opened the file again, the behavior did not change and the bad layers dialog came up again.
What could be going wrong? How could I correct this?
QGIS 2.18.16 on Ubuntu 16.04