This could be a resources issue on the terminal session.
To check this, please follow the steps below:
Open Task Manager by right clicking Task Bar on Computer or searching for the Task manager App.
Click More Details.
Select the Performance tab.
If the or Memory or CPU is running a full or extremely high capacity then Proclaim will take ages to load or not at all.
Select the Devices tab and see what is using the most resources and if possible close this program.
There may be other factors to consider but if the above does not help then please raise a new case online and reference the title of this article.