[FS#405] openvpn-mbedtls can not verify certificate

[LEDE Bugs]

The following task has a new comment added:

FS#405 - openvpn-mbedtls can not verify certificate
User who did this - Adrián Panella (ianchi)

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Hi, I'm having the same issue after switching from openssl to mbedtls.
I regenerated certificates with 2048length, and now the CA cert is ok, but now I get  get a validation error on the client cert:
"The certificate is signed with an unacceptable hash."

On the client side (running an openssl version) the server certificate is successfully validated 

Any ideas on what can be happening?

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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=405#comment2309