You should only be using Ublock Origin and whatever additional filter lists you prefer. Every other additional adblocker leads to very limited returns on investment (including some adblockers which are proprietary!) and even breaking compatibility with sites if the adblocker is overzealous.
Deactivate all your addons and see if it works. If it does, then re-activate them one-by-one (in order of which ones you want to keep the most) until it stops working again. Pay close attention to javascript modifiers (ad-blockers, noscript, any script-monkeys, etc.)
Do you run a VPN? Turn that off and try again.
Does it let you login using a private-session (incognito?)