[horde] CalDav calendar sync won't work after server change

[Arjen de Korte]

Citeren Michael J Rubinsky <mrubinsk at horde.org>:

> Quoting Frank Lienhard <frank at mclien.de>:
>
>>>
>>>> [30-Nov-2020 21:10:06] WARNING: [pool www] child 21678 said into stderr:
>>>> "[30-Nov-2020 21:10:06 Europe/Berlin] PHP Fatal error:  Cannot use
>>>> result of built-in function in write context in
>>>> ~pear/php/Archive/Tar.php on line 662
>>>
>>> This is not Horde code, but from PEAR's Archive_Tar package. You can
>>> remove that package, I don't believe it's required by Horde or any of
>>> its apps(?)
>> So I simply delete the Tar.php file?
>
>
> No, you uninstall the Archive_Tar package using PEAR.

I don't think this is possible without removing PEAR as well (this is  
a required package for PEAR). I suspect you're running an out-of-date  
version of Archive_Tar (and possibly PEAR as well). The most recent  
versions are:

   PEAR = 1.10.12
   Archive_Tar = 1.4.9
   Console_Getopt = 1.4.3
   Structures_Graph = 1.1.1
   XML_Util = 1.4.5

What does the output of 'pear list' show?