The error message you encountered while using Invoke-PnPSiteTemplate indicates that there is an issue with applying default column values when provisioning the site template. This error can occur due to various reasons, and here are some steps you can take to identify and rectify the issue:
Review the PnP-Provisioning-File.xml:
Open the "PnP-Provisioning-File.xml" and carefully review the content, especially the sections related to columns and default values.
Check if any of the columns have default values specified and ensure that the values are correct and properly formatted.
Verify Column Names:
Double-check that the column names used in the "PnP-Provisioning-File.xml" match the exact internal names of the columns in the target site where you are applying the template.
Column names are case-sensitive, so make sure they are spelled correctly.
Data Type and Format:
Ensure that the data type and format of the default values specified in the template match the data type and format expected by the corresponding columns in the target site.
For example, if a column expects a date value, make sure the default value is in the correct date format.
Special Characters and Encoding:
Check for any special characters or symbols in the default values and ensure that they are encoded correctly in the "PnP-Provisioning-File.xml."
Dependencies and Order:
If there are dependencies between columns, make sure the columns with default values are created before the columns that depend on them.
Test in Staging Environment:
To avoid impacting the production environment, consider testing the site template and provisioning process in a staging or development environment first.
This allows you to identify and resolve any issues without affecting the live site.
Update PnP PowerShell Module:
Ensure that you are using the latest version of the PnP PowerShell module to take advantage of bug fixes and improvements.
If you've gone through these steps and are still experiencing issues, it might be helpful to share a snippet of the "PnP-Provisioning-File.xml"