# Synchronization fail **URL:** \ **Category:** Syncing & AnkiWeb\ **Created:** [June 29, 2020, 6:05pm UTC](https://forums.ankiweb.net/t/synchronization-fail/594 "2020-06-29T18:05:10Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![mmdj2](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.ankiweb.net/mmdj2/32/124_2.png) [@mmdj2](https://forums.ankiweb.net/u/mmdj2)\ **Post date:** [June 29, 2020, 6:32pm UTC](https://forums.ankiweb.net/t/synchronization-fail/594/2 "2020-06-29T18:32:24Z")
about your not being able to synchronize, i can’t really help as i never had that issue. but about you not being able to open your profile after downgrading Anki, read this topic: > [@Uninstalled Anki 2.1.26 and installed 2.1.23. Can't open my profile](https://forums.ankiweb.net/t/uninstalled-anki-2-1-26-and-installed-2-1-23-cant-open-my-profile/219): > > Hi! When 2.1.26 came out for the Mac, I immediately updated my version of Anki. After doing so, I tried to download a few add-ons. It turns out, however, that these add-ons only support Anki 2.1.23 for the Mac. I uninstalled Anki and installed the 2.1.23 version instead. Now, I can’t open my profile and access my decks. Instead, I’m shown this error message. I’ve tried restarting my computer and manually opening back-up files my laptop had. Is there another workaround available? If it’s of any … --- _[View the full topic](https://forums.ankiweb.net/t/synchronization-fail/594)._