Packaging Air Application certificate problem: id.p12: failed to load a certificate

Hello Forum users,

I cannot package our air application to an APK file. This is what i do:
1. I open the build menu.
2. I click the Package AIR application button  
3. I select the build configuration from the list that i want an apk from
4. I click the Package button
5. I enter the Keystore password after i verified it is correct
6. I click OK

Then i get the error message "id.p12: Failed to load a certificate"

A couple of version back it just worked and now it doesn't. How can i troubleshoot this problem?

I use IntelliJ IDEA Ultimate 2017.2 that uses JRE 1.8.0_152-release-915-b5 x86_64 and JVM OpenJDK 64-Bit Server VM by JetBrains s.r.o. And i use the AIR SDK version 23.0.0.257. The operating system i use is MacOS Sierra version 10.12.5 (16F73).

I tried placing the certificate directly on the root of my mac to avoid spaces in the path to the certificate to see if it then did load but that also does not work.