Excel macro in an XLS file to export to PDF says "The object invoked has disconnected from its clients" for one user on multiple computers

I have posted this last month and stated that the solution was local PC user profile rebuild. However, the issue returned even after a second user profile rebuild and I found out that it is not limited to one PC.

We have an XLS file (not xlsm) saved in a network location with a button connected to a macro that exports the contents of a worksheet to a PDF file. It works for all users and their respective PC's. However, for one user (User2 to follow previous post) it shows the error message included in the summary on her PC (PC2) and on other PC's.  Other users can log onto PC2 and they do not have the issue. I have tested the export target as a mapped drive letter (which is the original), as a UNC path, and tested exporting to C drive and all failed. It is not a permission issue as User2 can write to the target. User2 can also manually export to PDF. The PC's have Windows 10 Professional and have the same version of Office via Office 365.

Below is the snippet from the macro code and the error occurs at  "ActiveSheet.ExportAsFixedFormat" line

  ActiveWorkbook.Save
    Sheets("Summary").Select
    ActiveSheet.ExportAsFixedFormat Type:=xlTypePDF, Filename:= _
    "T:\folder\path\export.pdf" _
    , Quality:=xlQualityStandard, IncludeDocProperties:=True, IgnorePrintAreas _
    :=False, OpenAfterPublish:=True
    Sheets("Summary").Select

The PC's are in an Active Directory domain environment and the target is a share on the file server.
Has anyone seen such issue?