error in database

hi i have problem with my data base for my opmnager
the id build is 11300 and my data base is posgress
the size of my backup is 2.50 gb aprox
i have a 512 devices with around 5600 interfaces

when I try to restore my database the application sends me an error

C:\ManageEngine\OpManager\bin\backup>RestoreDB.bat Backup_Pgsql_mar4_165220_1130
0.zip
********************************************************
* Warning!!! Attempting to restore the data !!! *
* This will result in loosing your current data!!! *
* Press Ctl+c to quit the operation. *
********************************************************
Press any key to continue . . .

Extracting property file please wait .....

Extraction completed.
file:C:\ManageEngine\OpManager\conf\ui.properties
[OpManagerUtil] COLUMNSTORE INDEX set is false
NetFlow Plug-In is not installed

Extracting zip file please wait .....

jdbc.RestoreException: Invalid Backup file.
at jdbc.AbstractRestoreDB.extractZipFile(AbstractRestoreDB.java:178)
at jdbc.AbstractRestoreDB.restoreDB(AbstractRestoreDB.java:87)
at jdbc.AbstractRestoreDB.doRestore(AbstractRestoreDB.java:423)
at jdbc.RestoreBackup.restoreDB(RestoreBackup.java:81)
at jdbc.RestoreBackup.main(RestoreBackup.java:203)
Caused by: java.util.zip.ZipException: error in opening zip file
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.<init>(Unknown Source)
at java.util.zip.ZipFile.<init>(Unknown Source)
at jdbc.AbstractRestoreDB.extractZipFile(AbstractRestoreDB.java:150)
... 4 more

Press any key to continue . . .

please i need your help