Why am I seeing 'Request header or cookies too large' error while customizing my store?

[REHANALI11]

This error apear in front of me when i went to customizemy store.

[NicoSpoke]

I was having this same issue, what worked for me was clearing my cookies. Once I refreshed I was able to interact with parts of the admin. In my case, as a developer, I was trying to use the Shopify GraphiQL App 

Hope it helps!

[help-ec]

Worked for me, it was impossible to edit templates. I cleared Chrome's cache of today and I can edit it again.

Thank you so much