can someone help get the plain text for this cipher

I came accros this cipher text when playing picoctf challenges, U3pRK2thdGdsV3NXVFhNV1NGM0pGbWFSdUJ6eFIrOWNGU2t1WjB6am9Udm9qSW5hUkZEajZyUW9ZM2RDanEydUp6eVMyU3g1cnlvSEZNODJKU2RIOUw0VTVSZmRjcThFMEF3RHUwN0lJN3Nyc3JvbnI5RWtEYUUyaDVISGhDZUo= but after running it through some online decoders i still get another cipher text if not mistaken, please help me out with this one