by Opacus

Full CalDAV bi-directional sync for SugarCRM. Use your native calendar on your favorite device to synchronise calls, meetings and tasks. Works with Apple (iOS), Android, and Thunderbird/Lightning.

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#2790 - Invalid server answer when i set the new account in calendar

Closed Bug? created by nordestinnovazione 5 years ago


I have installed activity sync in the crm of a client of mine and activated the license correctly. When i set the new account in my Android mobile calendar i get the following error: "Invalid server answer, check URL". I have followed the instructions but i can't connect , also another member of my team tried with an i phone but he get the same error. The crm version is 7.6.6 while the PHP version installed in the server is 7.0 Could it be a version problem?

Thanks in advance for the support.


  1. Opacus member avatar

    Opacus Provider

    5 years ago


    Can you just confirm that you have put the appropriate protocol on the beginning of your URL (http:// _or _https://). Additionally, make sure you're using a CalDev enabled calendar app.

    If none of this works or helps, can you contact where we can assist you further.

    Kind Regards, Oliver Scase.

  2. Opacus member avatar

    Opacus Provider

    4 years ago

    Closing as no response.

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