Hello Theo,
Thank you for reaching out to this forum. I'm Ravi, just like you, a fellow Microsoft user and I'm here to help you with your question today.
Is this feature stopped working recently? Could you please let us know if you have installed any plugin or ran windows updates recently?
If you have applied any filter, pull down the filter menu and select 'clear filter'
If nothing helps, please try below steps to reset Office / Excel.
- Close all office apps and sign out of the account
- Clear browser cache and cookies
- Do a safe reboot. You can start Safe Mode using the F8 key during start up.
- Go to temp location and clear all the files. To clear temporary files, Press Windows key + R to open the Run command. Then type “temp” in the search field and press OK.
- Try to an online repair. Go to Control Panel /> Under Programs, click Uninstall a Program /> spot Microsoft Office, right-click on it and select Change. Go with Quick Repair or Online Repair accordingly to fix the problem
Now kindly try to access the Multiple task information in Gantt Chart.
Hope this information would be useful to you. Please feel free to get back if you need any additional info.
Thank you!
Ravikumar
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