Cannot create folder on remote server

[Armadillo]

I have found that Pale Moon cannot create a new folder on a remote server.
When logged into our Office 365 cloud account and attempting to upload a series of image files, Office 365 reports the browser cannot create a new folder.
The details:
Windows 7 64-bit
Pale Moon 27.8.3
Office 365 OneDrive (Cloud Server)

Creating this in Windows 7
Create a master folder, under the master folder create several sub-folders. Into each respective sub-folder save photo image files.
This works well with I E, Chrome, and FireFox.
With any of the above three web browsers:
Log into Microsoft Office 365 OneDrive
Click the upload folder icon, then navigate on my hard drive to my images folders, select the new master folder and upload all files and folders.
The process at OneDrive:
OneDrive creates a new master folder from the new named folder on my hard drive.
OneDrive creates all the new sub-folders
OneDrive uploads all respective image files into the correct folders.
The entire process is completed within a few minutes.

What happens with Pale Moon:
In the OneDrive application click on the upload folder icon and after 10 - 20 minutes an error message appears on the monitor stating your web browser is not able to create folders.

Is there a technical setting I need to make that will enable Pale Moon to create folders on a remote cloud server?

Thank for any suggestions,

Michael G (Armadillo)

[Moonchild]

It's not known what the issue is, exactly, and the error thrown is something that Microsoft's web application does which has no meaning for us as browser developers.
For the time being, your best bet is to use a Microsoft browser for a Microsoft service if you want 100% functionality: if you need to use the browser to manage your cloud drive at Microsoft, use MSIE or Edge.