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[21:17:15] Error: Function not registered: 'SSCANF_Init'
[21:17:15] Error: Function not registered: 'SSCANF_Join'
[21:17:15] Error: Function not registered: 'SSCANF_Leave'
[21:17:15] Error: Function not registered: 'mysql_connect'
[21:17:15] Error: Function not registered: 'mysql_real_escape_string'
[21:17:15] Error: Function not registered: 'mysql_query'
[21:17:15] Error: Function not registered: 'mysql_store_result'
[21:17:15] Error: Function not registered: 'mysql_num_rows'

You have used these MYSQL and SSCANF functions before loading the MYSQL and SSCANF plugin, so for working MYSQL plugin and SSCANF plugin must be loaded first before calling those functions in the filterscript