On Frame Error when trying to search/add Alchemist mark to existing build

[Takaoshi]

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

What is the expected behaviour/value?

The error should not pop up when searching for/adding Alchemist mark to the build.

What is the actual behaviour/value?

When i search for or Add alchemist mark to my build i get this error. If i close path of building and restart it i cant open the build because the error will pop up everytime.

This only happens with the build in the pob link. It doesn't happen with a completely new build.

How to reproduce the issue

1. Searching for/adding Alchemist mark to the build

Character build code

https://pobb.in/rbSyA1l6P48n

Screenshots

[Regisle]

fixed by #4931

[LocalIdentity]

Fixed in 2.21.1