Hi
I guess you forgot the function IF. Instead of:
=ARRAYFORMULA((TRANSPOSE(FILTER('Form Master'!B:T; 'Form Master'!A:A=MAX('Form Master'!A:A)))=G1:K1;G1:K1;))
please try:
=ARRAYFORMULA(IF(TRANSPOSE(FILTER('Form Master'!B:T, 'Form Master'!A:A=MAX('Form Master'!A:A)))=G1:K1,G1:K1,))
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