Fatal error: Uncaught Error: Class 'ResponseData' not found in /home/opcon/src/dat/lib/jp/co/ks/merchanttool/connectmodule/entity/ReferenceResponseDataImpl.php:76 Stack trace: #0 {main} thrown in /home/opcon/src/dat/lib/jp/co/ks/merchanttool/connectmodule/entity/ReferenceResponseDataImpl.php on line 76