Update README.md

[arthursilvany]

add the troubleshooting below:

Troubleshooting

Error: Exception calling "Load" with "1" argument(s): "The file is not a valid Package file. If the file is encrypted, please supply the password in the constructor."

If you encounter the error:

Follow these steps:

1. Check if the file is encrypted:

   • This error occurs when the PowerPoint (.pptx) or Excel (.xlsx) file is encrypted or marked as confidential.

2. Change the file sensitivity:

   • If the file is marked as "Confidential", change its sensitivity to "General".
   • For PowerPoint (.pptx) or Excel (.xlsx) files, follow these steps:
     1. Open the file in Microsoft Office.
     2. Go to "File" -> "Info".
     3. Under "Properties", change the file's sensitivity to "General".

3. Recreate the file:

   • If the error persists, recreate the file, ensuring it is not configured with security restrictions or encryption.

[microsoft-github-policy-service]

@arthursilvany please read the following Contributor License Agreement(CLA). If you agree with the CLA, please reply with the following information.

@microsoft-github-policy-service agree [company="{your company}"]

Options:

• (default - no company specified) I have sole ownership of intellectual property rights to my Submissions and I am not making Submissions in the course of work for my employer.

@microsoft-github-policy-service agree

• (when company given) I am making Submissions in the course of work for my employer (or my employer has intellectual property rights in my Submissions by contract or applicable law). I have permission from my employer to make Submissions and enter into this Agreement on behalf of my employer. By signing below, the defined term “You” includes me and my employer.

@microsoft-github-policy-service agree company="Microsoft"

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