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Feed view unavailable

Hello,

I updated to 10.9.10 thanks to git pull origin master. But now I don’t have access to the feed view anymore, instead, I have an error message:

EmonCMS Error
Message: SyntaxError: JSON.parse: unexpected non-whitespace character after JSON data at line 1 column 2 of the JSON data
Route: feed/view
Line: 928
Column: 27

In addition, Redis doesn’t seem to work anymore:
image

While I can confirm that:

  1. In /var/www/html/emoncms/settings.php, I have
"redis"=>array(
    'enabled' => true
),
redisbuffer'   => array(
        'enabled' => false,
        'sleep' => 60
    ),
  1. redis-cli ping returns PONG
  2. sudo ps aux | grep redis returns
redis     3083  0.0  1.0 778396 75224 ?        Sl   00:22   0:00 /var/www/onlyoffice/documentserver/server/DocService/docservice
redis     3094  0.0  0.6 594104 51068 ?        Sl   00:22   0:00 /var/www/onlyoffice/documentserver/server/FileConverter/converter
redis     3100  0.0  0.9 713152 73856 ?        Sl   00:22   0:00 /var/www/onlyoffice/documentserver/server/FileConverter/converter /snapshot/server/build/server/FileConverter/sources/convertermaster.js
redis    20270  0.7  0.2  60900 16052 ?        Ssl  01:42   0:00 /usr/bin/redis-server 127.0.0.1:6379* 
  1. sudo systemctl status redis returns:
redis-server.service - Advanced key-value store
   Loaded: loaded (/lib/systemd/system/redis-server.service; enabled; vendor preset: enabled)
   Active: activating (start) since Mon 2021-11-15 01:44:06 CET; 1min 15s ago
     Docs: http://redis.io/documentation,
           man:redis-server(1)
Cntrl PID: 20440 (redis-server)
    Tasks: 4 (limit: 4915)
   Memory: 15.2M
   CGroup: /system.slice/redis-server.service
           └─20440 /usr/bin/redis-server 127.0.0.1:6379
  1. I don’t know if it’s related, but I see a lot of errors like this in the log:
    |WARN|PHPFina.php|get_meta() meta file does not exist '/var/opt/emoncms/phpfina/345.meta'

  2. Other parts of emoncms (dashboard, input, graph) work well

Config: Debian Buster, Apache, php8.0-fpm
Redis server v=5.0.14

Would anybody have an idea?