Hello,

I can't seem to install any themes, if I try manual upload or via marketplace both result in a page that shows "processing" spinning indefinitely. I've tried turning php errors on and so forth to try identify any issues. 

It would be worth checking modsecurity to see if anything is being logged there. Or any other similar item such as securi

I don't use those, do use cloudflare, but i've checked the http access records and can see it coming through ok, just a constant loop of the below

 

"GET /admin/?app=core&module=customization&controller=themes&do=import&file=/tmp/IPSzqShJs&key=16593e44c0f3ca4a4206f7cf645ce547&id=11&csrfKey=77352b269e0c21d13312cdd6ef735fad&mr=10&csrfKey=77352b269e0c21d13312cdd6ef735fad HTTP/2.0" 200 49 "/admin/?app=core&module=customization&controller=themes&do=import&file=/tmp/IPSzqShJs&key=16593e44c0f3ca4a4206f7cf645ce547&id=11&csrfKey=77352b269e0c21d13312cdd6ef735fad" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36"
 

I fixed this, my sso plugin was causing regenerate_session_id to be called recursively 

Very glad to see you got the issue resolved 🙂