Method 'Export' of Object '_Chart' Failed - OneDrive & SharePoint Issue

I am completely flummoxed. I managed to put together a piece of code to extract various bits of data from an Excel workbook and paste them into a Word document. Part of this process extracts a chart as a .png file. This was working seamlessly two weeks ago, but today, when I come to run the code, it is failing at this line:

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Absolutely NOTHING has been changed in the code, and NOTHING has been moved on my PC. I really don't know where to start looking for the reason why this no longer wants to work. Anyone any ideas?

Relevant bits in the code that precede this section are:

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EDIT: The yellow arrow is pointing at this section of the code:

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Changing this to GIF makes no difference.

I am getting a tooltip appearing at the point at which the code is highlighted in yellow saying "ActiveWorkbook = empty" - is this significant?

So I have discovered that this has something to do with OneDrive. The file in question has always existed on OneDrive and worked very happily before, but just at the moment it isn't. I have reset OneDrive and am waiting for it to resynchronise itself, then will try again and report back.

The code runs fine if I move the file to an ordinary folder on the PC. I am hoping that it's just a case of OneDrive having got its knickers in a bit of a twist.

All sorted. I have simply hard coded the file path into the VBA code instead of using wbBook.Path, and it's now working fine with my OneDrive (SharePoint).

Thanks to anyone who looked!