Hey @supermisha, 
Thanks for your post. Can you try our initial troubleshooting step of deleting and reinstalling the Strava app? Our recommended instructions are below:

1. Delete the Strava application from your phone
2. Power your device off for 10 seconds
3. Turn your phone back on
4. Reinstall the Strava application 

Note: You will not lose any data if you do this since all data is stored on the Strava servers.

Apple App Store:
Strava: Run, Ride, Swim
How to update your apps on Apple: Support - Apple

Google Play Store:
Strava: Track Running, Cycling & Swimming
How to update your apps on Android: Support - Google

If this does not resolve your issue, please submit a support ticket and our team can further investigate. 

Hi! 
i have the same problem & this doesn’t help. It only affects Strava & Safari on my phone - the two apps which I systematically uploaded photos to before the update. It’s infuriating. 
Can you suggest anything else or talk to Apple? Thanks! Catherine 

Same problem as OP, suggested solution did not help in my case.

Hi, It's a total pain, but I ended up deleting Strava & reinstalling it. Then it gave me the option to let me upload photos. I'm hoping this doesn't happen again the next time iOS updates, as it was a total pain!