SignerSignEx3 returns 800403F4

[AZphanus]

I followed all the instructions and WhiteListed all the DLLs that were blocked by AppLocker but now I am receiving an 800403F4 error. If I unregister the SIP I get a file not recognized. If I try signing a regular script it is signed with the certificate from the Key Vault. Does anyone have any ideas what is causing this error?

trce: AzureSignTool.SignCommand[0]
Retrieving current version of certificate {Signed-Cert].
trce: AzureSignTool.SignCommand[0]
Retrieved certificate with Id https://{key-Vault}.
trce: AzureSignTool.SignCommand[0]
Creating context
info: AzureSignTool.SignCommand[0]
=> File: C:\Users{File}.xlsm
Signing file.
trce: AzureSignTool.SignCommand[0]
=> File: C:\Users{File}.xlsm
Getting SIP Data
trce: AzureSignTool.SignCommand[0]
=> File: C:\Users{File}.xlsm
Calling SignerSignEx3 with flags: SIGN_CALLBACK_UNDOCUMENTED
fail: AzureSignTool.SignCommand[0]
=> File: C:\Users{File}.xlsm
Signing failed with error 800403F4.
info: AzureSignTool.SignCommand[0]
=> File: C:\Users{File}.xlsm
Stopping file signing.
info: AzureSignTool.SignCommand[0]
Successful operations: 0
info: AzureSignTool.SignCommand[0]
Failed operations: 1

[MLueling]

I have the same Problem! Did you find a solution?