After installing the Enspire Add-on, if you face any issue related to UI. You need to change some basic settings

For example: If the Buttons or the screens are not displaying properly.

Please follow the path as shown below:
Goto --> Modules --> Administration --> System Initialisation -->General settings

Click on Font & Bkgd tab and Uncheck the Auto Resize User Forms and click on Update as shown in the below screenshot:
After clicking on update button you will get a system message as below

Please click on Yes to save the change and it will close all the open windows

After making the changes please Re-login into SAP.