I have installed the Inventory Updater 1.2.6 on a ZC-2.1.0 with php8.3 and I click on admin>tools>inventory and it defaults back to the main page. I also have display logs v3.0.2 and it does the same thing. I have another site running the same ( ZC-2.1.0 with php8.3) and it works there. I'm not thinking it could be the Plugin Manager because I have usps Restful v1.7.0 installed and it works fine. Does anyone have an idea where to look?