Try to replace 5 by another number (for me 2 worked) such as these:
$ sudo i2cdump -y 0 0x50 $ sudo i2cdump -y 1 0x50 $ sudo i2cdump -y 2 0x50 $ sudo i2cdump -y 3 0x50 $ sudo i2cdump -y 4 0x50
Try to replace 5 by another number (for me 2 worked) such as these:
$ sudo i2cdump -y 0 0x50 $ sudo i2cdump -y 1 0x50 $ sudo i2cdump -y 2 0x50 $ sudo i2cdump -y 3 0x50 $ sudo i2cdump -y 4 0x50