No access to Adobe Stock

OK, the UK is not a problematic country. You shouldn't expect troubles because of internet outages. Did you try on a different network, like your cell phone's network?

Are you behind a corporate firewall? If yes, did the IT change something. And when they say that they did not change something, don't believe them. I'm IT, I know my peers. They always fiddle with the parameters, upgrades, new systems. Give them the endpoints: Adobe Creative Cloud Network Endpoints. I had the situation that some were getting blocked.

Do you have an individual licence? Adobe customer care can be contacted by beginning a secure chat session at https://helpx.adobe.com/contact.html?rghtup=autoOpen. Pop-up blockers need to be disabled! If the chat window fails to open, or is non-responsive, use a different device to start the interaction.
Support phone numbers may be found here: https://helpx.adobe.com/contact/phone.html. Please note that phone charges may apply.

For support via Twitter:
https://twitter.com/AdobeCare

(see also here: https://community.adobe.com/t5/creative-cloud-services/how-to-contact-adobe-support/td-p/11875703 or here
https://community.adobe.com/t5/account-payment-plan/how-to-contact-adobe-support/td-p/11843852)

If you have a Teams or Enterprise licence, go to https://adminconsole.adobe.com/support. You need to be a plan administrator for that. If you aren't, contact your plan administrator.

I tried both on Chrome and Safari with cleared caches. Have also tried via VPN just in case. Same behaviour unfortunately.

Also, when I'm logged in and if I click on the profile picture, under available quota, it says no plan which is incorrect.

Hi,

from which country are you?

For me here in europe there seem to be no problem. Do you have maybe a provider problem?

It works for me. Did you try on a different browser and / or computer?

Any news on this? I'm encountering the same issue. Homepage loads and works fine when you're not logged in. As soon as you log in you get an http error 500.