Test ICAPeg with OPNsense in response mode and preview size=0 ,by browsing this site " https://file-examples.com/index.php/sample-documents-download/sample-doc-download/" gives me this error

[amanymahmoud144]

2022/10/31 09:54:59 icap: panic serving 127.0.0.1:2834: runtime error: invalid memory address or nil pointer dereference
goroutine 13 [running]:
runtime/debug.Stack()
/usr/local/go/src/runtime/debug/stack.go:24 +0x65
icapeg/icap.(*conn).serve.func1()
/root/icapeg/icapeg/icap/server.go:106 +0xdd
panic({0x877520, 0xc45790})
/usr/local/go/src/runtime/panic.go:884 +0x212
io.(*multiReader).Read(0xc000013980, {0xc0001b1e00, 0x200, 0x200})
/usr/local/go/src/io/multi.go:26 +0x95
bytes.(*Buffer).ReadFrom(0xc000162a50, {0x828e88f18, 0xc0001969d0})
/usr/local/go/src/bytes/buffer.go:202 +0x98
icapeg/api.(*ICAPRequest).preview(0xc0000b8580?)
/root/icapeg/icapeg/api/icap-request.go:398 +0x217
icapeg/api.(*ICAPRequest).RespAndReqMods(0xc00006b200, 0xc0?)
/root/icapeg/icapeg/api/icap-request.go:215 +0x5ab
icapeg/api.(*ICAPRequest).RequestProcessing(0xc00006b200)
/root/icapeg/icapeg/api/icap-request.go:159 +0x7d8
icapeg/api.ToICAPEGServe({0x9a8d38, 0xc000162960}, 0xc0000ab200?)
/root/icapeg/icapeg/api/icap.go:21 +0x85
icapeg/icap.HandlerFunc.ServeICAP(0xc000093ed8?, {0x9a8d38?, 0xc000162960?}, 0xc00047646e?)
/root/icapeg/icapeg/icap/server.go:39 +0x2f
icapeg/icap.(*ServeMux).ServeICAP(0xc0000140b8, {0x9a8d38, 0xc000162960}, 0xc00012a3f0)
/root/icapeg/icapeg/icap/mux.go:94 +0x448
icapeg/icap.(*conn).serve(0xc000198680, 0x0?)
/root/icapeg/icapeg/icap/server.go:127 +0x7f
created by icapeg/icap.(*Server).Serve
/root/icapeg/icapeg/icap/server.go:207 +0x205