[Opensea] Failed to validate buy order parameters. Make sure you're on the right network!

Technical Issue Reporting
#1

when I use function fulfillOrder

message error: Failed to validate buy order parameters. Make sure you’re on the right network!

#2

Screen Shot 2022-03-02 at 14.39.32
Screen Shot 2022-03-02 at 14.39.32787×345 41.1 KB