can't open the addons store after updating

[techexplorers123]

Brief summary

after updating i can't open the addon store anymore

Steps to reproduce

try and open addon store from the tools menu

Actual behavior

the store doesn't open instead it gives an error which is attached below

Expected behavior

the store should open

NVDA logs, crash dumps and other attachments

ERROR - unhandled exception (12:30:27.427) - MainThread (17948):
Traceback (most recent call last):
File "gui\blockAction.pyc", line 112, in funcWrapper
File "gui_init_.pyc", line 487, in onAddonStoreCommand
File "gui\addonStoreGui\viewModels\store.pyc", line 78, in init
File "baseObject.pyc", line 59, in get
File "baseObject.pyc", line 167, in _getPropertyViaCache
File "addonStore\dataManager.pyc", line 410, in get_installedAddonGUICollection
File "addonHandler_init.pyc", line 616, in _addonStoreData
File "addonStore\dataManager.pyc", line 352, in _getCachedInstalledAddonData
File "addonStore\models\addon.pyc", line 360, in _createInstalledStoreModelFromData
File "addonStore\models\scanResults.pyc", line 25, in fromDict
TypeError: 'NoneType' object is not subscriptable

NVDA type

installed copy

NVDA version

2026.1beta11 (2026.1.0.55460)

Have you tried any other versions of NVDA? If so, please report their behaviors.

the previous versions works fine

Windows version

Version 10.0.26100 Build 26100

Name and version of other software in use when reproducing the issue

No response

Other information about your system

it's Microsoft Windows 11 IoT Enterprise LTSC

Does the issue still occur after restarting your computer?

I have restarted my computer and the issue still occurs

If NVDA add-ons are disabled, is your problem still occurring?

I have restarted NVDA with add-ons disabled and the issue still occurs

Does the issue still occur after you run the COM Registration Fixing Tool in NVDA's tools menu?

I have run the COM Registration Fixing Tool and the issue still occurs

[josephsl]

Hi,

This can happen if metadata for a recently updated add-on is missing information about Virus Total scan results. Did you update add-ons prior to discovering this problem?

Thanks.

[XLTechie]

The store needs to be resilient to that problem. This is release blocking IMO. A user has no way of predicting or preventing that outcome. I would think either such add-ons should be dropped from the view, or the store should pick some sane default.

[techexplorers123]

This can happen if metadata for a recently updated add-on is missing information about Virus Total scan results. Did you update add-ons prior to discovering this problem?

i have auto updates enabled so not sure.
as @XLTechie pointed out, this shouldn't be a problem in the first place.
the store either should ignore that if that is missing or pick a default
it is extremely frustrating to track that down
thanks

[CyrilleB79]

I am facing the same issue. It is occurring just after NVDA restart following an add-on update.
In the meantime, is there a workaround to open the Add-on Store with 2026beta11? Deleting the add-on store cache files do not change anything.

[CyrilleB79]

I have given a try as follows:

• Created portable copy with 2026.1beta5
• Installed 2 add-ons
• Upgraded to 2026.1beta11
• Confirmed that Add-on Store can still be opened
• Installed an add-on

I was hoping to reproduce the issue, but the issue was not present. Though, I noticed in the latest _cachedCompatibleAddons.json file of this portable release that in the various top-level fields of the json structure, there is a "data" field, which only contain one single string which is more than 1000000 character long. This string contains json like data. So it seems to me that we have json data which is stored in a string instead of being directly contained in the field itself as a json substructure.
FYI @SaschaCowley or @seanbudd