ERROR - PURCHARSE REQUISITION - SAP FIORI

DEAR EXPERTS ,

I have SAP FIORI in my enterprise (Installed two application ) , but only SAP FIORI Aplications (Approve Purcharse requisition ) not load.

I found an issue hen select the(Approve Purcharse requisition )  . the screen shoWing is Waiting and not load this app.

There is some log to check or some solution

Please tell me if exist some ay to fix this issue or hoW could I to find a error log.

Regards