After change regional settings, pages with SPFx webparts gives unexpected error has occurred.

[VesaJuvonen]

From @geogikk92 on November 17, 2017 7:29

• Question
• Bug
• Enhancement

After change regional settings in SharePoint 2016 On-Premise server to Bulgarian, Macedonian оr other Locale

I have following error:

Error from log file is:

Message : System.FormatException: String was not recognized as a valid DateTime. at
System.DateTimeParse.Parse(String s, DateTimeFormatInfo dtfi, DateTimeStyles styles) at Microsoft.SharePoint.ClientSideComponent.SPClientSideCachedThirdPartyComponentProvider.GetUpdateTimeFromAppCatalog(SPWebweb) at Microsoft.SharePoint.ClientSideComponent.SPClientSideCachedThirdPartyComponentProvider.GetDistributedUpdateTime(Guid tenantId, SPWeb web) at Microsoft.SharePoint.ClientSideComponent.SPClientSideCachedThirdPartyComponentProvider.EnsureCacheIsValid(SPWeb web, Guid tenantId) at Microsoft.SharePoint.ClientSideComponent.SPClientSideCachedThirdPartyComponentProvider.GetNotFoundComponents(SPClientSideComponentQueryResultCollection requests, SPWeb web) at Microsoft.SharePoint.ClientSideCom...

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Copied from original issue: pnp/sp-dev-fx-webparts#367

[VesaJuvonen]

From @waldekmastykarz on November 20, 2017 11:33

Did you customize the list's Add form and put a SharePoint Framework client-side web part on it?

[VesaJuvonen]

From @geogikk92 on November 20, 2017 11:47

Yes! I replace my default add listItem form with customized SharePoint Framework client-side web part.

My WebPart working with Locale(English(USA)), but others locale(Bulgarian, Macedonia and other) doesnt working, give above error in stacktrace.

[VesaJuvonen]

From @waldekmastykarz on November 20, 2017 11:57

@VesaJuvonen do you have more information about if SPFx web parts are not meant to be used on list form pages and the behavior is by design or if this is a potential bug in SPFx that needs further investigation?

[VesaJuvonen]

From @geogikk92 on November 20, 2017 12:5

I have SPFx web parts In site classic pages and error is the same.

[VesaJuvonen]

From @waldekmastykarz on November 20, 2017 12:9

Which version of the SharePoint Framework Yeoman generator did you use to scaffold the project?

[VesaJuvonen]

From @geogikk92 on November 20, 2017 12:15

The version of the SharePoint Framework Yeoman is:

.yo.rc.json file contains:

{
"@microsoft/generator-sharepoint": {
"version": "1.3.4",
"libraryName": "lirex-holidays",
"libraryId": "c715415a-9890-4a12-b72b-0dc8244f1bb3",
"environment": "onprem"
}
}

[VesaJuvonen]

From @darekjpro on November 23, 2017 11:32

Having the same issue.
Using the latest version of Yeoman (1.3.4). Solution targeted for SharePoint 2016 onwards.
SPFx web part added to classic web part page working fine with English-US regional settings. Changing site regional settings to English-UK causes the same error in ULS (String was not recognized as a valid DateTime.)
Thanks.

[geogikk92]

Did you find anything on my question? This is a blocker for my project. Thank you! :)