Unable to open build

Check version

• I'm running the latest version of Path of Building and I've verified this by checking the changelog

Check for duplicates

• I've checked for duplicate issues by using the search function of the issue tracker

Check for support

• I've checked that the behaviour is supposed to be supported. If it isn't please open a feature request instead (Red text is a feature request).

What is the behaviour ingame?

No In-Game abnormalities

What is the behaviour in Path of Building?

Opening the build the error message as seen in the image pops up. This only happens with this specific build, the other builds I opened do not exhibit this behavior. I have attempted re-installing path of building, yet the error still persists. I have also attached a zip file containing the build.
Self-Cast Crit.zip

How to reproduce the issue

Not having a gem level (deleting the level and causing it to be blank)

Character build code

Unable to provide character build code

Screenshots

Start by opening the attached Self-Cast Crit.zip build and reproduce the failure after leaving a gem level blank, then compare it with builds that open successfully. The issue is resolved when a build with a blank gem level opens without the reported error.