Script not working any more

[albert-t25]

Seems the script has stopped working. I get the following error:

Setting up new ACME identifier for mail.example.al using mail.example.al_Cert_2021_02.
System.Management.Automation.CmdletInvocationException: Invalid URI: The URI scheme is not valid. ---> System.UriFormatE
xception: Invalid URI: The URI scheme is not valid.
   at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind)
   at ACMESharp.AcmeClient.GetDirectory(Boolean saveRelative) in C:\projects\acmesharp\ACMESharp\ACMESharp\AcmeClient.cs
:line 142
   at ACMESharp.POSH.NewIdentifier.ProcessRecord() in C:\projects\acmesharp\ACMESharp\ACMESharp.POSH\NewIdentifier.cs:li
ne 103
   at System.Management.Automation.CommandProcessor.ProcessRecord()
   --- End of inner exception stack trace ---
   at System.Management.Automation.Internal.PipelineProcessor.SynchronousExecuteEnumerate(Object input, Hashtable errorR
esults, Boolean enumerate)
   at System.Management.Automation.PipelineOps.InvokePipeline(Object input, Boolean ignoreInput, CommandParameterInterna
l[][] pipeElements, CommandBaseAst[] pipeElementAsts, CommandRedirection[][] commandRedirections, FunctionContext funcCo
ntext)
   at System.Management.Automation.Interpreter.ActionCallInstruction`6.Run(InterpretedFrame frame)
   at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)
   at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)
New-ACMEIdentifier : Invalid URI: The URI scheme is not valid.
At C:\Mdaemon\LetsEncrypt\letsencrypt.ps1:441 char:23
+         $Identifier = New-ACMEIdentifier -Dns $domain -Alias $global:Alias -Erro ...
+                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [New-ACMEIdentifier], UriFormatException
    + FullyQualifiedErrorId : System.UriFormatException,ACMESharp.POSH.NewIdentifier

The script is stopping because an error occurred.