Unable to run the restore command in Node2 from Node1 part of Alwayson DB addition

declare @databasename nvarchar(max)

declare @sqlbackup nvarchar(max)
declare @sqlrestore nvarchar(max)
declare @PrimaryAG nvarchar(max)
declare @SecondaryAG nvarchar(max)
declare @backupPath nvarchar(max)
declare @linkedserve