Excel VBA - Error : we found a problem with some content...

1. Quick Fix Steps
Enable All Content
Click on “Enable content” in the yellow warning bar when opening the document
File → Information → Enable Content → “Always enable active content for this document”
2. Clear the document cache
Close Excel
Delete the temporary file:
%AppData%\Microsoft\Excel\XLSTART\  
%Temp%\Excel8.0\  
3. Common Causes and Repair
Scenario A: Macro Signing Problems
Re-sign the VBA project:
Development Tools → Visual Basic → Tools → Digital Signature
or add as a trusted location:
File → Options → Trust Center → Add New Location
Scenario B: Corrupted Modules
Export all modules (.bas file)
New Excel file → Re-import modules
4. Repair the file structure manually:
Rename the file to .zip
Unzip the file and check if xl/vbaProject.bin is corrupted.
Copy normal file from backup and replace it
 VBA Project reset:
vba
Sub ResetVBAProject()
    ThisWorkbook.VBProject.References.RemoveAll
    Application.VBE.MainWindow.Visible = True 'Show VBE window
End Sub
(You need to enable “Trust Access to VBA Project Object Model” first)
5. Preventive measures
Best Practice:
Regularly use Debug -> Compile VBAProject
Avoid using high-risk commands such as SendKeys/Shell in your code
Save in .xlsb format for increased stability
6. Handling of corporate environments
 Group Policy Configuration:
Administrator Run gpedit.msc
Navigate to:
User Configuration → Administrative Templates → Microsoft Excel 2016 → Excel Options → Security
Enable:
“Trust access to the VBA Engineering Object Model”
“Allow older versions of Dynamic Data Exchange (DDE)”