We can't help you if you don't provide the information we ask for. Nothing is asking you to post the contents of the error report. Again, see Steps to Reproduce for the kind of description we need.
The relevant thing here would be to explain that you're trying to sync and getting the above error.
It looks like you imported a huge number (>500) of feeds, and that's currently breaking syncing for you. We'll look into fixing that, but for now the fix would be to reduce the number of feeds you have in Zotero.
Upgrade Storage
(you can bump an old thread if you don't get a response within a couple of days or so, but have some patience; also see https://www.zotero.org/support/reporting_problems#provide_steps_to_reproduce for creating more helpful reports about errors.
version => 6.0.18, platform => MacIntel, oscpu => Intel Mac OS X 10.16, locale => zh-CN, appName => Zotero, appVersion => 6.0.18, extensions => Zotero Word for Mac Integration (6.0.4.SA.6.0.18, extension), Zotero LibreOffice Integration (6.0.3.SA.6.0.18, extension), Zutilo Zotero 工具箱 (3.10.0, extension)
The relevant thing here would be to explain that you're trying to sync and getting the above error.
It looks like you imported a huge number (>500) of feeds, and that's currently breaking syncing for you. We'll look into fixing that, but for now the fix would be to reduce the number of feeds you have in Zotero.
I can't Sync WebDAV
Steps to reproduce:
Click “Sync”
error：'value' cannot be longer than 30000 characters
work.