A 1.29.3 compatible version of the mod The Grand Exhibition
To install, unzip contents of grand exhibition.zip. This will give you 6 .zip, and 6 .mod files. Put all 12 of these files in your Documents\Paradox Interactive\Europa Universalis IV\mod folder.
If you deleted this after you installed 1.29, just create the folder again and put the mod in there. The mod will appear as "local mod" in the new launcher. This version has an updated version of frontend.gui that contains the changes from 1.28 to 1.29 which were crashing the previous version. It also updated the supported version on the .mod files so they no longer read out of date.