Has the hosting location changed? lsio.ams3.digitaloceanspaces.com no longer appears to exist. As a result, the plugin fails to populate a list for the download & install portion.
$ ping lsio.ams3.digitaloceanspaces.com
ping: cannot resolve lsio.ams3.digitaloceanspaces.com: Unknown host
$ nslookup lsio.ams3.digitaloceanspaces.com
Server: 1.1.1.1
Address: 1.1.1.1#53
** server can't find lsio.ams3.digitaloceanspaces.com: NXDOMAIN
I can access digitaloceanspaces.com and digitalocean.com just fine..
$ ping -c3 digitaloceanspaces.com
PING digitaloceanspaces.com (104.28.0.176): 56 data bytes
64 bytes from 104.28.0.176: icmp_seq=0 ttl=54 time=32.374 ms
64 bytes from 104.28.0.176: icmp_seq=1 ttl=54 time=35.279 ms
64 bytes from 104.28.0.176: icmp_seq=2 ttl=54 time=38.662 ms
--- digitaloceanspaces.com ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 32.374/35.438/38.662/2.570 ms
$ ping -c3 digitalocean.com
PING digitalocean.com (104.16.181.15): 56 data bytes
64 bytes from 104.16.181.15: icmp_seq=0 ttl=54 time=25.418 ms
64 bytes from 104.16.181.15: icmp_seq=1 ttl=54 time=26.105 ms
64 bytes from 104.16.181.15: icmp_seq=2 ttl=54 time=25.647 ms
--- digitalocean.com ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 25.418/25.723/26.105/0.286 ms