Can’t update plugin

Hi I am trying to update your plugin but it keeps erroring with the following message:
Update Failed: Could not create directory. stackable-ultimate-gutenberg-blocks/src/components/__experimental-multi-post-picker-control

My current plugin version is 2.6.1 and trying to update to 2.9.1.

I tried to manually add this directory to the plugin folder and then click update but still received this error.