Hi
10.5.50.0/22 is not possible network cause 50 in binary 00110010 is a host address for 3th byte so you can not use as network address.
IP Range 10.5.48.1 - 10.5.51.254 so 10.5.50.0/22 is a IP between range. 1022 host available
10.5.48.1/22 should be the gateway ( IP address on interface)
10.5.50.0/23
10.5.50.1/23 should be the gateway ( IP address on interface)
IP Range 10.5.50.1 - 10.5.51.254. 510 host available
Remember network and IP address are different, you can use
http://www.subnet-calculator.com to check IP address/network you would like to use.
Router expect IP address in a interface with format 10.5.0.1/16 and automatically knows belong to 10.5.0.0/16 network if you don't specify
My advice is with the new IP address, make hotspot setup again because you will need a new pool, new DHCP server, etc etc in order to your hotspot work properly.
Regards.