How to Fix Project for the Web Blank Task Tab and Connection Error
Question details
Users are experiencing a blank or slow-loading task tab accompanied by a connection error when accessing Project for the Web.
- Product
- Project for the Web
- Device & OS
- not provided
- Scenario
- Accessing project tasks and schedules, particularly when Project for the Web is embedded or opened through Power Apps.
- Observed behavior
- The task tab remains completely blank, loads excessively slowly, or displays an error message stating 'login.microsoftonline.com refused to connect'.
Verify your internet connection and ensure that third-party cookies are not blocked in your web browser, as this can prevent authentication services from loading.
Verify Power Apps Configuration and Authentication
Determine if the connection error is stemming from the Power Apps environment and seek expert configuration review.
Since Project for the Web relies on the Microsoft Power Platform, a 'refused to connect' error usually indicates an authentication block or an environmental misconfiguration within Power Apps.
Check if the blank task tab error exclusively happens when opening Project for the Web embedded through a Power Apps portal or application.
Open an Incognito or Private window in your web browser and attempt to log in again to rule out cached credentials or cookie conflicts causing the login.microsoftonline.com error.
If the problem is confirmed to be related to Power Apps, navigate to the official Power Apps Community forum (https://powerusers.microsoft.com/t5/Building-Power-Apps/bd-p/PowerAppsForum1) and post your environment details so Microsoft specialists can review your configuration.
Manage Your Projects Efficiently with WPS Office
If you are struggling with complex environment configurations in Microsoft's project tools, consider using WPS Office. It provides a lightweight, free alternative for managing project schedules, budgets, and tasks using powerful spreadsheets.
- 1. Visit the website: Go to the official WPS Office website to access the download page.
- 2. Download the software: Click on 'Download WPS Office Free' to save the installer to your device.
- 3. Install and start organizing: Run the installer, open WPS Spreadsheet, and choose a project management template to start tracking your tasks immediately.
Frequently Asked Questions
Why does login.microsoftonline.com refuse to connect in Project for the Web?
This error typically occurs because your browser is blocking third-party cookies, which prevents the embedded Microsoft authentication service from verifying your credentials within Power Apps.
How can I check if Project for the Web is experiencing a service outage?
You or your IT administrator can log into the Microsoft 365 Admin Center and navigate to the Health > Service health dashboard to see if there are active incidents affecting Project or Power Apps.
Will clearing my browser cache fix the blank task tab issue?
Yes, clearing your browser's cache and cookies can often resolve authentication loops and loading issues that cause the task tab to remain blank.
