Click on submission results in error "Impossible to invoke a method ("id") on a null variable."

[chromadesign]

My forms are working fine and emails are sent without a problem. But when I click on a submission in the backend I get a template error saying "Impossible to invoke a method ("id") on a null variable.", see screenshot below.

[hubertprein]

Sounds like something else might be going wrong on your end, as I can't reproduce this. The only .id that is happening there, is on craft.users. Which should be working just fine, as craft.users can't be null.

[chromadesign]

Interestingly enough, when moving the site to a different URL the problem solved itself! God knows why...

[hubertprein]

That's weird indeed. Glad it got solved though!

If it happens again, reopen the issue and we'll see if we can reproduce it.

[akuales]

I do have the same problem now after trying to post forms via ajax.
At some point I couldn't open any submission anymore from any other form I created.

[haabe]

I experience this error as well, but not using Ajax.

I think it might be related to whether you are logged into Craft as a user or not when submitting the form.

[chasegiunta]

Also experiencing this problem.

[chasegiunta]

@hubertprein This stems from the version of Craft you have. craft.users will be null if you're on a Personal or Client license, as Craft doesn't allow users. Just to test, you can try to output any craft.users method in any twig template and it will break.

Upgrading to Craft Pro license fixes this.