Dumb question, are those bindings not installed (not showing on PaperUI) or did you only see this Error message. That later happened to me during update from 2.5.7 to 2.5.8, however al binding got installed finally.
Ok, I do a restart again. No I have nothing read about release notes. Like a real beginner, I just started the update in openhabian-config.
After reboot, I get this in log, filtered on: hue
2020-08-28 17:11:31.791 [temChannelLinkRemovedEvent] - Link 'dimmerColorStudioLight2 => hue:0210:ecb5fa2f2064:bulb2:color' has been removed.
2020-08-28 17:11:31.792 [temChannelLinkRemovedEvent] - Link 'switchStudioPlugIn1 => hue:0010:ecb5fa2f2064:plug1:switch' has been removed.
2020-08-28 17:11:31.799 [temChannelLinkRemovedEvent] - Link 'dimmerStudioLight1 => hue:0100:1:bulb1:brightness' has been removed.
2020-08-28 17:11:31.804 [temChannelLinkRemovedEvent] - Link 'switchStudioLight2 => hue:0210:ecb5fa2f2064:bulb2:color' has been removed.
2020-08-28 17:11:31.805 [temChannelLinkRemovedEvent] - Link 'colorStudioLight2 => hue:0210:ecb5fa2f2064:bulb2:color' has been removed.
2020-08-28 17:11:31.809 [temChannelLinkRemovedEvent] - Link 'dimmerColorTempStudioLight2 => hue:0210:ecb5fa2f2064:bulb2:color_temperature' has been removed.
2020-08-28 17:12:07.549 [INFO ] [el.core.internal.ModelRepositoryImpl] - Loading model 'hue.items'
2020-08-28 17:12:09.429 [INFO ] [el.core.internal.ModelRepositoryImpl] - Loading model 'hue.things'
2020-08-28 17:12:27.060 [INFO ] [el.core.internal.ModelRepositoryImpl] - Loading model 'hue-bridge-changed.rules'
2020-08-28 17:12:30.766 [hingStatusInfoChangedEvent] - 'hue:group:ecb5fa2f2064:0' changed from UNINITIALIZED to UNINITIALIZED (BRIDGE_UNINITIALIZED)
2020-08-28 17:12:30.794 [hingStatusInfoChangedEvent] - 'hue:bridge:ecb5fa2f2064' changed from UNINITIALIZED to UNINITIALIZED (DISABLED)
2020-08-28 17:12:30.824 [hingStatusInfoChangedEvent] - 'hue:0100:ecb5fa2f2064:bulb1' changed from UNINITIALIZED to UNINITIALIZED (BRIDGE_UNINITIALIZED)
2020-08-28 17:12:30.829 [hingStatusInfoChangedEvent] - 'hue:0210:ecb5fa2f2064:bulb2' changed from UNINITIALIZED to UNINITIALIZED (BRIDGE_UNINITIALIZED)
2020-08-28 17:12:30.833 [hingStatusInfoChangedEvent] - 'hue:0010:ecb5fa2f2064:plug1' changed from UNINITIALIZED to UNINITIALIZED (BRIDGE_UNINITIALIZED)
Clearing the cache is reported to overcome some initial problems, can’t say if it wouöüld help in your case.
I see the restdocs as one off the bindings, at least this one has changed its setup location. If you have the addons installed via a file you migth need to adjust that one ( or leave that part completlyto PaperUI).
I had a similar problem with my hue bridge: Log: UNINITIALIZED to UNINITIALIZED (BRIDGE_UNINITIALIZED)
After many attempts i added the hue bridge as a Thing manually and Bingo! It changed to online and the InBox filled up. Dont forget to follow the log to know when to press the button on the physical bridge.