Hello!
i've tried to install MN...

main.h

//  inline int64_t GetMNCollateral(int nHeight) { return 4000; }
inline int64_t GetMNCollateral(int nHeight) {
    if(nHeight < 40000) return 100;
    else return 1000;
}

compare with https://masternodes.online/currencies/ALTH/

Then I tried to fix 1000 by 100 and compile.

In any case, does not find the transaction vin

and this in log!
2019-06-11 09:36:50 socket recv error 104
2019-06-11 09:36:52 CActiveMasternode::GetMasterNodeVin - Could not locate valid vin
2019-06-11 09:36:52 CActiveMasternode::Register() - Error: could not allocate vin

so, can devs help me?

Nice project, try to get it listed in Xevenue.com, they have zero listing fee.