Sentence Based Segmentation Rules Add/Edit Error "Value cannot be null. Parameter name: item"

Question

When attempting to add or edit a sentence based segmentation rule in the Language Resources of a new or existing TM, I expect to see the "Edit Segmentation Rule" window as displayed in this screenshot that I took last month: 
 
 However, I now see the following error message: 
 
 This is occurring in Trados Studio 2024 - 18.0.1.2259 on a Windows 11 OS with all updates installed. 
 I did not see this error earlier this month before I installed the latest updates. 
 I have attempted the following resolutions without any success: 
 
 Searching this forum for a similar issue - I see many unresolved issues for errors "Value cannot be null", and none involve segmentation rules 
 Restarting 
 Repairing the installation 
 Uninstalling and reinstalling 
 Deactivating all plugins (Trados Copilot - AI Assistant and LanguageWeaverProvider) 
 Using new/existing projects 
 Using new/existing TMs 
 Using different language pairs 
 
 Thanks in advance for any help you can provide 
 
 P.S. This discussion post form appears to have some issues: 
 1. The forum's sentiment analysis also appears to be broken: 
 
 2. The link to the list of forums is dead

Paul · Answer

Adam Wooten 
 Adam Wooten said: 1. The forum's sentiment analysis also appears to be broken: 
 Must have been a temporary glitch... it's there now and working 
 Adam Wooten said: 2. The link to the list of forums is dead 
 Thank you. I don't think we actually need that bit anymore as we found a better way to ensure the correct forums are used by intercepting the posts before it gets posted and using AI to evaluate the content and suggest a more appropriate forum if necessary. That actually saves us a ton of administration in moving posts as so many users just post anywhere without checking. I'll either get it removed, or just remove the link so any further changes won't catch us out! 
 Georgiana Iancu fyi :-) 
 On your Trados question... 
 Adam Wooten said: This is occurring in Trados Studio 2024 - 18.0.1.2259 on a Windows 11 OS with all updates installed. 
 I did not see this error earlier this month before I installed the latest updates. 
 I can actually reproduce this on W10 and also W11 without the latest updates. It maybe logged already, but I'll log it again to be sure. Thanks for reporting it.

Community Jira · Answer

Thank you for bringing this to our attention. Our development team will review it in the context of our ongoing projects and priorities. Your understanding and patience as we assess this matter is appreciated. We have recorded the issue in our tracking system under the reference number CRQ-40275

Trados Studio > 1. Trados Studio

Sentence Based Segmentation Rules Add/Edit Error "Value cannot be null. Parameter name: item"