Earthdawn Character Sheet Spell Thread Weaving/Attuning Difficulty

Using the Earthdawn character sheet, I can't figure out how to adjust thread weaving/attuning difficulty for spells in the Grimoire, which causes all sorts of failures when trying to cast from the character sheet, since there's no thread weaving calculation that can be done. I am using the 3rd edition modifier, but there doesn't seem to be an edition check in the API for the calculations. What I'm seeing though is that the field for repeating_matrix_X_SPM_Numbers is readonly and seem to lack any classes to make it modifiable? I'm not sure if this is just straight up not supported if we use the 3rd edition modifier. Has anyone else experienced similar?

Have you read the wiki documentation for the sheet? <a href="https://wiki.roll20.net/Earthdawn" rel="nofollow">https://wiki.roll20.net/Earthdawn</a>

Yes, I've read the wiki, but this isn't covered. The field for repeating_matrix_X_SP_Numbers (thread weaving/attuning difficulty) is not editable for me in the Grimoire tab. It's locked to any kind of input (see the WvF field in the screenshot below). Without that value available, using any form of spell casting from the sheet itself (such as via the Spells tab or the "Do Stuff" button in the Grimoire tab) will fail due to the lack of a value there. I'm not sure what configuration I have that's wrong that's keeping me from editing this field.