Exception value can't be null

[WilliamZheng]

When I expand the a site collection node, it throw "Value cannot be null. Parameter name: key".

[sidper]

Same issue. It worked until recently

[gszdev]

Hi @bramdejager,

I'm also faced with the same issue.
The issue is not reproducable for all my site collections. I think the issue only happens on "newer" site collections.

Steps to reproduce:

• Create a new communication site
• Add the new site to SPCB

Here are some details from the SPCB log:

Microsoft.SharePoint.Client.ServerException: Value cannot be null.
Parameter name: key
at Microsoft.SharePoint.Client.ClientRequest.ProcessResponseStream(Stream responseStream)
at Microsoft.SharePoint.Client.ClientRequest.ProcessResponse()
at Microsoft.SharePoint.Client.ClientContext.ExecuteQuery()
at SPBrowser.Extentions.SiteExtentions.IsCurrentUserAdmin(Site site)
at SPBrowser.NodeLoader.LoadWeb(TreeNode parentNode, Web web, MainForm form)
at SPBrowser.NodeLoader.LoadSite(TreeNode parentNode, ClientContext ctx, Site site, MainForm form, List`1 subwebs)

I don't know wether you can do something.
Maybe some checking for NULL or RootWeb, CurrentUser, ... is initialized correctly may help.
Thx.

[imir-hoxha]

I am facing the same issue here.

[ismikhaylov]

Hi!
I have same issue, it works well two weeks ago

[bramdejager]

Thanks for the feedback. I’ll have a look at it. It seems not all sites face the issue. Some have and some don’t. Have not figured out what’s the difference. Outlook voor iOS<https://aka.ms/o0ukef> downloaden

…

________________________________ Van: Iliya <notifications@github.com> Verzonden: Friday, September 18, 2020 7:50:03 PM Aan: bramdejager/spcb <spcb@noreply.github.com> CC: Bram de Jager <bramdejager@outlook.com>; Mention <mention@noreply.github.com> Onderwerp: Re: [bramdejager/spcb] Exception value can't be null (#98) Hi! I have same issue, it works well two weeks ago — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub<#98 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ADFSIY7FULOK2T4YABOBOWTSGOMUXANCNFSM4RGOSPKQ>.

[patrikhellgren]

I'm also seeing the same issue. @bramdejager you might want to have a look at the issue reported over in pnp/sp-dev-docs to see if this is related: SharePoint/sp-dev-docs#6281
At least it is the same error message and seems to have started on the 9th of september so the timing is also the same.

[slavag]

Same issue here, we see this in lot of our customers, not all , but many (thousands).
Started at Sep 9.

[bramdejager]

Checked a bunch of conditions, but I'm not able to track back any weird incorrect conditions. I have the same issue and error message on different tenants. But not all. Some tenants seem to work fine and don't cause any issues. I updated the CSOM to the latest version (August) but did not resolve the issue. I validated server/farm versions, but all were on version 16.0.20509.12005.

[jansenbe]

@bramdejager : I'm also seeing this issue and can reproduce with creating a private channel in Teams and then connecting to that site using SPCB. Doing a Fiddler trace showed the 4th CSOM call after connecting a site collection fails with a server error. I did pull the ULS logs for that error and noticed a server side JSON serialization issue (which clearly is a bug). Looking at the stacktrace in the ULS log the error seems to originate from loading the ThemeInfo property: can you try to exclude that property and see if it fixes things?

[jansenbe]

@bramdejager : internal thread started on this, will keep you all posted of the outcome

[bramdejager]

@jansenbe it lookes excluding the ThemeInfo object is solving the issue. I'll release an intermediate release as a workaround.

[phill29]

Any movement on this? Is _api/web/ThemeInfo expected to work again anytime soon?

[bramdejager]

Released a temporary release as a workaround, please see release SPCB v4.10.1. This release excludes the ThemeInfo object from loading.