Not able to sync on Mac OS X Yosemite 10.10.5
An error occurred during a connection to api.zotero.org.
SSL received a record that exceeded the maximum permissible length.
Error code: SSL_ERROR_RX_RECORD_TOO_LONG
SSL received a record that exceeded the maximum permissible length.
Error code: SSL_ERROR_RX_RECORD_TOO_LONG
Currently using Zotero 5.0.55, and getting the same error.
I tried to "Report errors..." but got the following message:
Invalid response from repository
See https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message#w_avast-and-avg-security-products for discussion of this error in Firefox (which Zotero uses as a base).