AutoCAD Electrical 2022 loads without the Project Manager and typing in AEPROJECT at the command line to open it results in an ‘Unknown command “AEPROJECT”. Press F1 for help.’ error:
The problem can be caused by the recent AutoCAD Electrical 2022.0.2 Hotfix. The AceLoader.dll file that was mistakenly replaced with the Hotfix needs to be reverted to the original file.
Replacing the AceLoader.dll file is not needed for English installations, see the note 'This file is only for AutoCAD Electrical 2022.0.2 of non-English installations.'
See the Notes: section here on the 2022.0.2 Hotfix:
Verify that you’re in AutoCAD Electrical 2022.0.2 at the top right at the Help pull-down menu. Select About AutoCAD Electrical 2022:
In the About dialog box the Product Version should be at the AutoCAD Electrical 2022.0.2 Update: