FPP 8.4 Back up

[JeffC]

Trying to do a simple backup on my FPP 8.4.2 PI 3B+ but when I select Download Cofig I get nothing. And if I try to do a back up on my FPP (PI 4 ) I get the same result, nothing.
But if I go to my Pocket Beagle for my TuneTo sign the backup works exactly as expected.
The FPP's I have with just wlan0 backup as expected, it's the 2 FPP's I have with both wlan0 and eth0 that don't 
Not sure what I'm missing here.
If anyone has any ideas I'm all ears.
Thanks

[darylc]

What browser?  Works for me in firefox, I heard someone say that their browser was blocking the download.

[JeffC]

Thanks.
I'll give Firefox a try, but google chrome, MS edge nor Brave have worked. It's very odd that it works on 3 of 5 devices with 8.4 of FPP

[father1e]

I am having this problem as well in one of 4 FPPs. Trying to create JSON config backup just gives blank page in browser.
I found errors in the apache2-error.log. It looks like backup.php is expecting an array but received a null.

Here are log entries:

[Sun Jan 05 12:00:27.795680 2025] [proxy_fcgi:error] [pid 1173:tid 1249] [client 192.168.0.50:52181] AH01071: Got error 'PHP message: PHP Fatal error:  Uncaught TypeError: array_key_exists(): Argument #2 ($array) must be of type array, null given in /opt/fpp/www/api/controllers/backups.php:360\nStack trace:\n#0 /opt/fpp/www/api/controllers/backups.php(313): process_jsonbackup_file_data_helper()\n#1 /opt/fpp/www/api/lib/limonade.php(430): GetAvailableJSONBackups()\n#2 /opt/fpp/www/api/index.php(189): run()\n#3 {main}\n  thrown in /opt/fpp/www/api/controllers/backups.php on line 360', referer: http://192.168.45.203/backup.php
[Sun Jan 05 12:00:37.055953 2025] [proxy_fcgi:error] [pid 1174:tid 1272] [client 127.0.0.1:56006] AH01071: Got error 'PHP message: PHP Fatal error:  Uncaught TypeError: array_key_exists(): Argument #2 ($array) must be of type array, null given in /opt/fpp/www/api/controllers/backups.php:360\nStack trace:\n#0 /opt/fpp/www/api/controllers/backups.php(313): process_jsonbackup_file_data_helper()\n#1 /opt/fpp/www/api/lib/limonade.php(430): GetAvailableJSONBackups()\n#2 /opt/fpp/www/api/index.php(189): run()\n#3 {main}\n  thrown in /opt/fpp/www/api/controllers/backups.php on line 360'
[Sun Jan 05 12:00:37.057369 2025] [proxy_fcgi:error] [pid 1174:tid 1264] [client 192.168.0.50:52184] AH01071: Got error 'PHP message: PHP Warning:  file_get_contents(/home/fpp/media/config/ci-dmx.json): Failed to open stream: No such file or directory in /opt/fpp/www/backup.php on line 1887; PHP message: PHP Fatal error:  Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /opt/fpp/www/backup.php:2217\nStack trace:\n#0 /opt/fpp/www/backup.php(2004): pruneOrRemoveAgedBackupFiles()\n#1 /opt/fpp/www/backup.php(1947): doBackupDownload()\n#2 /opt/fpp/www/backup.php(216): performBackup()\n#3 {main}\n  thrown in /opt/fpp/www/backup.php on line 2217', referer: http://192.168.45.203/backup.php
[Sun Jan 05 12:01:44.734611 2025] [proxy_fcgi:error] [pid 1174:tid 1275] [client 192.168.0.50:52265] AH01071: Got error 'PHP message: PHP Fatal error:  Uncaught TypeError: array_key_exists(): Argument #2 ($array) must be of type array, null given in /opt/fpp/www/api/controllers/backups.php:360\nStack trace:\n#0 /opt/fpp/www/api/controllers/backups.php(313): process_jsonbackup_file_data_helper()\n#1 /opt/fpp/www/api/lib/limonade.php(430): GetAvailableJSONBackups()\n#2 /opt/fpp/www/api/index.php(189): run()\n#3 {main}\n  thrown in /opt/fpp/www/api/controllers/backups.php on line 360', referer: http://192.168.45.203/backup.php