how can I send a data with photon fusion

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hello I have a map data byte[,] and i wanna send it to all players I create RPC to send it like that

and it didn't work it works only on the host ( the server creator and i wanna all the players get this rpc i try to change the source and the targets but i got errors btw this script is not a NetworkBehaviour it's MonoBehaviour,INetworkRunnerCallbacks i try everything to send this data and i couldn't please anyhelp it's been 3 days now trying to find a solution ...

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