version 2 in light and extended version available --- see first posting!
Select more then one savestate with B-button (selection list)
Extra Menu added
Backup of Savestates added
Mass delete added (for current game)
Rename gamestates to .state.auto (extended version)
Rename gamestate to .state0 (extended version)
Remove all gamesstates except selected one (extended version)
I found myself in the same situation when I installed the Retropie Manager. Told me I had invalid BIOS files and also rom titles I tried to transfer to my pi. I already was transferring through ssh, but thought I would try the manager out. Boy was I mistaken..lol.
@joabro My advice is to use another method to upload a few ROMs, (via USB drive, over the network) then if you continue to have issues I would say start over fresh. Probably easier than troubleshooting the issue.
If the ROMs you transfer via an alternative method transfer and show then the issue is with the web manager.
I uncommented it and set the rights as you advised:
pi@raspberrypi:~ $ cat /etc/rc.local
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
# In order to enable or disable this script just change the execution
# By default this script does nothing.
#hciconfig hci0 up
#hciconfig hci0 pscan
"/opt/retropie/supplementary/retropie-manager/rpmanager.sh" --start --user pi 2>&1 > /dev/shm/rpmanager.log &
pi@raspberrypi:~ $ /opt/retropie/supplementary/retropie-manager/rpmanager.sh --isrunning
RetroPie-Manager is not running