[horde] Encrypted notes cannot be decrypted

[Andreas Mauser]

Hi Matus,

----- Nachricht von Matus UHLAR - fantomas <uhlar at fantomas.sk> ---------
   Datum: Mon, 24 May 2021 08:30:46 +0200
     Von: Matus UHLAR - fantomas <uhlar at fantomas.sk>
Betreff: Re: [horde] Encrypted notes cannot be decrypted
      An: horde at lists.horde.org


> On 23.05.21 15:21, Andreas Mauser wrote:
>>
>> PHP ERROR: Cannot modify header information - headers already sent
>
> this can be usually avoided by configuring:
> output_buffering = 4096

Thank you so much for the hint.
I set this in /etc/php/php7.4/apache/php.ini and  
/etc/php/php7.4/cli/php.ini but the error doesn't go away.