Running the following command in the console of the TEST release of v.1.7.1 (v1.7.1-rc4) results in an error and no file is created as expected:
makeairdropfile "my_bsc_address_here" 1 "airdrop.txt"
The error returned is:
regex_error (code -1)
A screenshot is attached.

This is happening with the GUI and the CLI wallets (CLI error: error: {"code":-1,"message":"regex_error"})
I am using a newly downloaded copy of the TEST release of v1.7.1 of the Phore Core wallet (v1.7.1-rc4, expanded from phore-1.7.1-win64.zip).