Apache $apr1$ MD5 separator unmatched error on example hash

[snoozing-hyena]

Hi everybody

I tried to run hashcat with the Apache $apr1$ MD5 example hash obtained from here with the following command:
(Note that I include the hash since it is anyway stated as an example hash..)

Code:

./hashcat64.bin -m 1600 -a 3 $apr1$71850310$gh9m4xcAn3MGxogwX/ztb.

I received this error:

Code:

hashcat (v5.1.0) starting...

* Device #1: WARNING! Kernel exec timeout is not disabled.
            This may cause "CL_OUT_OF_RESOURCES" or related errors.
            To disable the timeout, see: https://hashcat.net/q/timeoutpatch
nvmlDeviceGetFanSpeed(): Not Supported

OpenCL Platform #1: NVIDIA Corporation
======================================
* Device #1: GeForce GTX 1050, 1010/4042 MB allocatable, 5MCU


Hash '1850310/ztb.': Separator unmatched
No hashes loaded.

Started: Sun Mar 29 16:18:02 2020
Stopped: Sun Mar 29 16:18:02 2020

I tried with several other Apache $apr1$ MD5 hashes and got the same error as well.

Any help or hints are appreciated.

Thanks.