This is a minor patch to Umbraco 8.11.x branch that addresses an issue that can occur with MultiUrl picker values when stored in nested or block content.

Issues

• 400 Issues with MultiUrl Pickers and Blocks

More

The issue occurs if you have single-pick multi-url pickers inside block or nested content and no values are selected, uSync prior to this version would serialize the value out as an empty string "". Within the back office the blocks and content would still render, on the front end your would get a null reference exception if your code attempted to access the values inside the mult-url picker properties.

N.B this null reference error is fixed in Umbraco 8.18 and above.

This patch would only be required if running less than Umbraco 8.18