Use a polybius square to decode

nyrggresidualggduy

Convert letters to numbers using a=0 where numbers should be

nyr66residual663uy

Reverse

ops52loeb424ud

Loeb is Henry Richard Loeb

ops52richard424ud

Use a keyboard mirror cipher to get

qts44?629mv

Z was in capital letter the reason it converts to “?” which is question.

qts44question629mv

Code returns invalid. Atbash the keyword only

qts44answer629mv