[Dpi_read_comm_keys] No such file or directory on Cygwin

[niutech]

When I run dillo data:text/html,Hello%2C%20World version 3.2.0-rc1 in Cygwin I get the following output:

Domain: Default accept.
dillo_dns_init: Here we go! (threaded)
TLS library: mbed TLS 2.23.0
Trusting 148 TLS certificates.
Disabling cookies.
Nav_open_url: new url='data:text/html,Hello%2C%20World'
** ERROR **: [Dpi_read_comm_keys] No such file or directory
Dpi_check_dpid: check_st=-1
Dpi_check_dpid: EAGAIN
Dpi_blocking_start_dpid: try 1
[dpid]: a_Misc_mksecret: e4d94003
dpid started
Dpi_check_dpid: check_st=1
Dpi_check_dpid: OK
Dpi_get_server_port: server_name = [proto.data]
[<cmd='check_server' msg='proto.data' '>]
Dpi_get_server_port: can't read server port from dpid.
Dpi_connect_socket: can't get port number for proto.data

Now there is a file ~/.dillo/dpid_comm_keys with the following contents: 5020 e4d94003 but Dillo doesn't load anything.
After Dillo restart, the window is still blank and this is the console output:

Domain: Default accept.
dillo_dns_init: Here we go! (threaded)
TLS library: mbed TLS 2.23.0
Trusting 148 TLS certificates.
Disabling cookies.
Nav_open_url: new url='data:text/html,Hello%2C%20World'
Dpi_check_dpid: check_st=1
Dpi_check_dpid: OK
Dpi_get_server_port: server_name = [proto.data]
[<cmd='check_server' msg='proto.data' '>]
Dpi_get_server_port: can't read server port from dpid.
Dpi_connect_socket: can't get port number for proto.data

The port 5020 is opened, which is seen by netstat:

Active Connections

  Proto  Local Address          Foreign Address        State
  TCP    127.0.0.1:5020         PC:65373             TIME_WAIT

[rodarima]

Dpi_connect_socket: can't get port number for proto.data

It looks dpid cannot find the data: builtin plugin. What is the value of dpi_dir in ~/.dillo/dpidrc? https://dillo-browser.github.io/user_help.html#dpidrc

[niutech]

Here is ~/.dillo/dpidrc:

dpi_dir=/usr/local/lib/dillo/dpi

proto.file=file/file.dpi.exe
proto.ftp=ftp/ftp.filter.dpi.exe
proto.data=datauri/datauri.filter.dpi.exe

And here is ls /usr/local/lib/dillo/dpi/:

bookmarks  cookies  datauri  downloads  file  ftp  hello  vsource