LetsEncrypt - Error Retrieving Certificate

I received an email from the system today saying:

An error occurred during the LetsEncrypt process. The error message is: The specified module 'ACME-PS' was not loaded because no valid module file was found in any module directory.

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When I looked in letsencrypt.log I see the following:

Starting Script run at 12/10/2019 08:29:14.
Get the MDaemon paths.
The MDaemon.ini Path is F:/MDaemon/App/MDaemon.ini.
The MDaemon APP Path is F:/MDaemon/App/.
The MDaemon Pem path is F:/MDaemon/Pem.
The MDaemon Log path is F:/MDaemon/Logs/.
The MDaemon RAW path is F:/MDaemon/Queues/Raw/.
The WorldClient Path is F:/MDaemon/WorldClient.
The WorldClient HTML Path is F:/MDaemon/WorldClient/HTML.
The well-known path is F:/MDaemon/WorldClient/HTML/.well-known.
The Acme-Challenge path is F:/MDaemon/WorldClient/HTML/.well-known/Acme-challenge.
The State Path is F:/MDaemon/Pem/_LEState.
The FQDN is set to mail.dtmtimber.com.au.
The email address is set to postmaster@mail.dtmtimber.com.au.
The certificate thumbrpint in the MDaemon.ini file is 9C94 E093 A68A 435A EB3D AA9B 5C45 4B67 60E3 E3F9.
Looking for the local certificate.
I found a certifcate from LetsEncrypt.
The certificate is going to expire in the next 30 days, requesting a new certificate.
Importing the ACMESharp module.
Import-Module : The specified module 'ACME-PS' was not loaded because no valid module file was found in any module
directory.
At F:/MDaemon/LetsEncrypt/LetsEncrypt.ps1:746 char:5
+ Import-Module ACME-PS -ErrorVariable LogText
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo : ResourceUnavailable: (ACME-PS:String) [Import-Module], FileNotFoundException
    + FullyQualifiedErrorId : Modules_ModuleNotFound,Microsoft.PowerShell.Commands.ImportModuleCommand

The script is stopping because an error occurred.

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