对话流调用报错

`{"code":777777775,"msg":"Workflow operation failure: panic error: runtime error: invalid memory address or nil pointer dereference, \nstack: goroutine 334414 [running]:\nruntime/debug.Stack()\n\t/usr/local/go/src/runtime/debug/stack.go:26 +0x5e\ngithub.com/coze-dev/coze-studio/backend/application/workflow.(*ApplicationService).OpenAPIChatFlowRun.func1()\n\t/app/application/workflow/chatflow.go:476 +0x4b\npanic({0x557cec0?, 0xa045740?})\n\t/usr/local/go/src/runtime/panic.go:792 +0x132\ngithub.com/coze-dev/coze-studio/backend/application/workflow.(*ApplicationService).OpenAPIChatFlowRun(0xa1db6e0, {0x687d198, 0xc0017e8450}, 0xc001d2b180)\n\t/app/application/workflow/chatflow.go:564 +0x969\ngithub.com/coze-dev/coze-studio/backend/api/handler/coze.OpenAPIChatFlowRun({0x687d198, 0xc0017e8450}, 0xc0024f2c08)\n\t/app/api/handler/coze/workflow_service.go:1110 +0x199\ngithub.com/cloudwego/hertz/pkg/app.(*RequestContext).Next(0xc0024f2c08, {0x687d198, 0xc0017e8450})\n\t/go/pkg/mod/github.com/cloudwego/hertz@v0.10.2/pkg/app/context.go:833 +0x4f\nmain.startHttpServer.I18nMW.func11({0x687d198, 0xc001703b90}, 0xc0024f2c08)\n\t/app/api/middleware/i18n.go:51 +0xcc\ngithub.com/cloudwego/hertz/pkg/app.(*RequestContext).Next(0xc0024f2c08, {0x687d198, 0xc001703b90})\n\t/go/pkg/mod/github.com/cloudwego/hertz@v0.10.2/pkg/app/context.go:833 +0x4f\nmain.startHttpServer.SessionAuthMW.func10({0x687d198, 0xc001703b90}, 0xc0024f2c08)\n\t/app/api/middleware/session.go:44 +0x23f\ngithub.com/cloudwego/hertz/pkg/app.(*RequestContext).Next(0xc0024f2c08, {0x687d198, 0xc001703b90})\n\t/go/pkg/mod/github.com/cloudwego/hertz@v0.10.2/pkg/app/context.go:833 +0x4f\nmain.startHttpServer.OpenapiAuthMW.func9({0x687d198, 0xc001703b90}, 0xc0024f2c08)\n\t/app/api/middleware/openapi_auth.go:147 +0x2c6\ngithub.com/cloudwego/hertz/pkg/...`