Yes you can use Web.LoadAndInstallApp method
Please have a look at a little proof of concept below:
$url = "https://TestSite.sharepoint.com"
$username = "Testuser@testsite.sharepoint.com"
$password = "Lidf$ijsd@f$"
$appfilepath = "C:\temp\app.app"
$Password = $password |ConvertTo-SecureString -AsPlainText -force
Write-Host "Load CSOM DLLs" -...
Here is the line may help you:
This does not seem to be a supported use case at the moment. It is
possible with SharePoint Add-Ins, but not SPFx WebParts.
You can find the complete thread Deployment to Developer Site is not possible
Add-ins are future, You have to work on that.
To setup Set up a development environment for SharePoint Add-ins on Office 365
SharePoint Online Development for Office 365
Other hand you can create a sandbox solution locally and test, once done then upload to sharepoint online.Create visual webpart for SharePoint Online
Most technical people working with ...
You don't need to delete the page.You just need to check in the page even if it is same account.
ReplaceContent allows you to overwrite the ghostable file.This is nw
SharePoint doesn’t freak out if the file already existed in the library but it never allowed us to replace the file.
Please find link below.
If it the Farm solution( full trust code) then you have to deploy it to sharePoint Staging farm.
You can use the powershell like this.
Add -SPSolution "path of file i.e. C:\test.wsp"
Install-SPSolution –Identity "test.wsp" –WebApplication “http://target web application “ –GACDeployment
But if it is Sandbox solution then you can do it like this.
SPFx extensions will work only on Developer Tenants.
If your tenant is on First release or General Availabilty(which looks like your tenant from the current error message) , it will not work.
To create a developer tenant, you can use either of the below 2 links:
Reference - SPFx ...
Open the project folder
You will find the "Feature" folder inside that. If you have any other .cs or .aspx files outside the folder, then it might be solution.
If you don't have any thing outside of the "Feature" folder and you have files inside the "Feature" folder, then it is a FEATURE.
Project can also contain the solution as well as the feature.
By looking at the Visual Studio solution (not to be confused with a SharePoint solution WSP), you can easily tell what you have:
In the Visual Studio project (from the Solution Explorer of VS), if you see a "Features" folder with one or more sub-folders in it: you have a SharePoint project that builds into a SharePoint WSP package. That package contains ...
The solution was found on MSDN forums:
Run services.msc and start the following services:
SharePoint Timer Service
Then, in IIS Manager, restart SharePoint applications.
If the startup type is set to Manual, change it to Automatic to avoid the error in the future.