While EPM add-in (any version) and IBP recent version (2105 and above) are installed side by side in MS Excel, EPM add-in reports may not work anymore.  They are not recognized anymore (EPM add-in side pane is empty), they cannot be edited anymore (ribbon "edit report" button is greyed out) and they look like pure Excel cells. 

IBP and EPM add-in development teams are currently working on a fix. 

In the meantime, we recommend to customers downgrade IBP version to IBP version 2102.3 to avoid corrupting their EPM add-in reports. When reverting to IBP version 2102.3, EPM add-in reports should work again (can be edited again, are recognized) as long as they have not been saved while IBP 2105 version and above was installed.