The key is the "i-kFxvFcX". This is the image key associated to the album/creator. Ex, review the initial url and find where you see the "i-". The "kFxvFcX" can be substituted for a known and good album in order to get to the gallery that contains it.
Example -
https://marinariumparks.smugmug.com/...-1/i-cvTsGtd/A
With that url you would substitute the last i-cvTsGtd/A with "i-kFxvFcX" to make
https://marinariumparks.smugmug.com/...AM-1/i-kFxvFcX and then enter. It autmatically changes the gallery from the marinariumparks gallery to the new link at
https://maryarnold.smugmug.com/Quara...ber-/i-kFxvFcX
so it all is in the i-XXXXXXX. replace it with the i-code to a good album and there is a +75% chance you can see the gallery at its source. If not, its either private, or the gallery is deleted.