I know how to insert error bars in the bar graph on Google spreadsheet, but for some reason I couldn't, due to the drop-drown of the series section consisting of only column 1 and not the other.How can i fix this problem?

To troubleshoot this issue and fix the problem of the series section drop-down only displaying column 1, you can try the following steps:

1. Ensure that your data setup is correct: Make sure that your spreadsheet contains the appropriate data for the bar graph. Each column of data should represent a different series for the bar graph, and each row should contain the corresponding values for each series.

2. Verify selection of correct data range: When inserting error bars, ensure that you have selected the correct data range. Click on the "Add Chart Element" button (looks like a plus sign) on the top-right corner of the chart, select "Error Bars," and then click on "Customize" to confirm that you've selected the correct data range.

3. Check if the chart type supports error bars: Not all types of charts in Google Sheets support error bars. Make sure that you have selected a bar graph or column chart as your chart type, as these types typically support error bars. Other chart types like pie charts or line charts may not have the option to add error bars.

4. Update Google Sheets version or try on a different browser: Occasionally, certain features may be limited or have issues in older versions of Google Sheets or specific web browsers. Make sure you are using the most up-to-date version of Google Sheets and try using a different browser, such as Google Chrome or Mozilla Firefox, to see if that resolves the problem.

5. Clear cache and cookies: Clearing your browser's cache and cookies can sometimes resolve issues with certain website functionalities. Try clearing your cache and cookies and then reopen Google Sheets to see if the error bars option appears correctly.

If these steps do not resolve the issue, it is possible that there may be a technical limitation or bug within Google Sheets. In that case, you may want to consider reaching out to Google Support for further assistance.