I have found and adapted a script for google sheets for our timesheeting system that copies a template sheet to create a blank timesheet, whilst maintaining certain protections, to stop people breaking formulas.
In the spreadsheet there are a couple of other sheets, but the main thing is we keep running the script to add new sheets for each person. After exactly 4 additions, the script stops functioning completely, with the error:

Exception: Service Spreadsheets failed while accessing document with id [insert doc ID code here]

Script below:

function duplicateSheetWithProtections() {
  var ss = SpreadsheetApp.getActiveSpreadsheet(); 
  sheet = ss.getSheetByName('Template');
  sheet2 = sheet.copyTo(ss).setName('BLANK TIMESHEET'); 
  var protections = sheet.getProtections(SpreadsheetApp.ProtectionType.RANGE);
  for (var i = 0; i < protections.length; i++) {
    var p = protections[i];
    var rangeNotation = p.getRange().getA1Notation();
    var p2 = sheet2.getRange(rangeNotation).protect();
    p2.setDescription(p.getDescription());
    p2.setWarningOnly(p.isWarningOnly());
    if (!p.isWarningOnly()) {
      p2.removeEditors(p2.getEditors());
      p2.addEditors(p.getEditors());
      // p2.setDomainEdit(p.canDomainEdit()); //  only if using an Apps domain 
   }
  }
  sheet2.activate();
}

To clarify, I also have these sheets in the workbook by default (in case sheet count is a factor for some reason:

• Overview
• Overtime report
• Template (Hidden, this is the sheet that gets copied)
• Settings (Hidden, just contains data validation stuff)

So to simply conclude, I have a timesheet template that gets duplicated on a button press per person. I can add 4 sheets to the doc and then the 5th gets the error code listed above.