The operation >= cannot accept the arguments: , [empty-string], [40]

[PKLEK2C_IP2022]

Runtime Error

The operation >= cannot accept the arguments: , [empty-string], [40]
Note: You will not see another error reported for 5 seconds

[vknow360 (Sunny Gupta)]

@PKLEK2C_IP2022

The operation >= cannot accept the arguments: , [empty-string], [40]

Pretty much self explanatory.
You should increase your debugging skills.

[Still-learning (1-2-3-4...)]

Do you must know which value is getting trigger first… as said by @vknow360 try debugging the blocks… learn which one triggering first… your error is due to null value returns from fb