Empty folder list after upgrade from 8.7.11 to 8.8.8

[derRichard]

Hi!

After the upgrade webmail no longer shows the folder list.
I'm aware of this wiki page: https://wiki.zimbra.com/wiki/Steps_to_f ... _webclient
But I have already set both zimbraReverseProxyAvailableLookupTargets and zimbraMailReferMode.

My setup has proxy mode enabled, but I'm using only one server.
The proxy mode is mostly used to have decent LetsEncrypt support.

How can I debug this problem? For example, which log file might contain a hint?

Thanks,
//richard

[bwicksall]

Do you use uBlock Origin? I have two completely separate Zimbra instances that suddenly had this problem today. It turns out uBlock started blocking something the Zimbra client needs. Lost an hour before I realized what was happening.

[derRichard]

Do you use uBlock Origin? I have two completely separate Zimbra instances that suddenly had this problem today. It turns out uBlock started blocking something the Zimbra client needs. Lost an hour before I realized what was happening.

Wow, yes. uBlock Origin blocked the folder list.
Shame on me, I spent 2 hours staring at Zimbra logs but didn't manage to check my browser...

Thanks!

[tminh]

Do you use uBlock Origin? I have two completely separate Zimbra instances that suddenly had this problem today. It turns out uBlock started blocking something the Zimbra client needs. Lost an hour before I realized what was happening.

Thank you so much, you saved my life

[DavidMerrill]

I think I'm running into this too, good catch!

[axslingr]

Same here. Started doing it to me yesterday.

Lance