This morning , in the update of Jetpack, the management screen no longer appear

Thanks for the report! We’re looking into it, and you can follow our progress here:
https://github.com/Automattic/jetpack/issues/5105

In the meantime, could you contact your hosting provider, and ask them to check your server configuration to make sure it supports functions like random_bytes and random_int? That would help, too.

I’ll post again as soon as I have news!

We are having the same identical problem on the domain
https://www.orientalmed.ac.uk
if you try to access the admin area the response would be
Fatal error: Uncaught exception ‘Exception’ with message ‘There is no suitable CSPRNG installed on your system’ in /home/oriental/public_html/wp_icom/wp-includes/random_compat/random.php:205 Stack trace: #0 /home/oriental/public_html/wp_icom/wp-includes/random_compat/random_int.php(153): random_bytes() #1 /home/oriental/public_html/wp_icom/wp-content/plugins/jetpack/sync/class.jetpack-sync-queue.php(41): random_int() #2 /home/oriental/public_html/wp_icom/wp-content/plugins/jetpack/sync/class.jetpack-sync-sender.php(284): Jetpack_Sync_Queue->__construct(3) #3 /home/oriental/public_html/wp_icom/wp-content/plugins/jetpack/sync/class.jetpack-sync-sender.php(40): Jetpack_Sync_Sender->set_defaults(1, 1000000) #4 /home/oriental/public_html/wp_icom/wp-content/plugins/jetpack/sync/class.jetpack-sync-sender.php(32): Jetpack_Sync_Sender->__construct(‘sync’) #5 /home/oriental/public_html/wp_icom/wp-content/plugins/jetpack/sync/class.jetpack-sync-actions.php(282): Jetpack_Sync_Sender::get_instance() #6 /home/oriental/public_html/wp_ic in /home/oriental/public_html/wp_icom/wp-includes/random_compat/random.php on line 205

Can you please answer the following questions:
Would it be a suitable solution to remove the Jetpack folder from cpanel?
Would it be too risky?
What could the consequences be?
Thanks a lot

That’s a good solution, yes. It will get rid of the error. Once you’ve done that, I’d recommend installing the previous version of Jetpack, that you can download here:
https://downloads.www.ads-software.com/plugin/jetpack.4.2.2.zip

Thanks Jeremy it worked and now the admin area is back on line; however, I can’t install the old plugin because when I try the following error comes up

The uploaded file exceeds the upload_max_filesize directive in php.ini.

Any idea?

I’m afraid that’s a common WordPress issue. You can learn how to fix it here:
https://wptheming.com/2009/07/upload_max_filesize/

Thanks Jeremy
php.ini was not in the wp_admin directory and not having enough experience with php I preferred to unzip the plugin and transfer it via FTP. It would be nice if can let us know when the update is going to be safe to install.
Thanks again for the prompt reaction.
Cheers

Hi,

I got the same error after updating to ver 4.3

after I deleted jetpack from the pluginsfolder and reinstalled ver 4.2.2 (thanks for your help) I checked for “random_int” and “random_bytes” to find out:

you need php7 for that!?
or is it possible to use it in earlier php versions? the php-manual shows that these are php7 functions.

after changing php ver 5.2(module) to ver 7(cgi) for my domain and updating jetpack again to 4.3 it looks like there is no longer a problem.

Sorry for my bad english…

is it possible to use it in earlier php versions?

WordPress includes a compatibility library for sites that don’t run PHP 7 yet, but in some cases that wasn’t accessible.

This will be fixed in Jetpack 4.3.1!