I am experiencing the same issue as described in this post.
However, what resolved the issue in that case didn't work for me.
To expend on the issue I am experiencing (with a little borrowed text from the above post):
* I open my camera * I press the little Bixby Vision eye on the bottom left of my camera display. * I get the message box: Update Bixby Vision? You must update Bixby Visio to continue. * I get the option to choose 'Cancel' or 'Update'. * I select "Update" * The message box disappears and is replaced by a message saying 'Updating' with a colorful 'thinking wheel' that keeps spinning. * After a few moments the message disappears and a white page appears to open for a split second but then it disappears and the same message box "Update Bixby Vision?" appears again.
* It iterates through these steps .... perpetually ... never updating ... never working.
I have tried everything described in the post above:
*Clear Cache and Data
I even tried to update my Android version (which is what resolved the issue in the other post) but I already have android 8.0 installed and there are no updates available.
When I try to update the software manually it says that I have the latest version of Bixby installed.