2809436 - Getting error "Invalid ip item or ip range" wihle trying to add IP address/ranges in IP Restriction Management tool

While trying to add the new IP addresses / ranges but it's throwing an error: "Invalid ip item or ip range:xxx.xxx.xxx.x-xxx.xxx.xxx.xxx"

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SAP SuccessFactors HCM Suite

SuccessFactors, Platform, Invalid ip item or ip range, IP restriction management, IP address, IP range, Single IP Address, error, add IP address, LOD-SF-PLT , KBA , LOD-SF-PLT-IPR , IP Restriction Management , Problem